This artifact resides in our Private Collection, yet we welcome inquiries from restorers, museums, or serious enthusiasts. Please email us with the name of the artifact at Curator AeroAntique. Approximately The crystal glass was secured by a bezel and gaskets to seal the movement against dust. The winding and setting crown was positioned adjacent to the quick set button. The dial had a lusterless black finish with printed indexes and numbers. The civil date, day sub-dial was located at the center of the main dial, with numerals and indexes. Large Arabic numerals indicated the even-numbered hours and, small Arabic numerals indicated the odd-numbered hours. The extra ‘touch’ for this clock is the custom stand.

Aircraft Clock, 8-day Civil Date Indicator Aeronaval (CDIA) Waltham WWII

Do I mean that old pocket watch maker, Waltham? Yes, this is sort of the same Waltham of Massachusetts, USA, that started in the mid 19th century and was one of the premier American watch makers. Here is how that worked out. In about Waltham was purchased by the Japanese, and that was the end of it being a truly American watchmaking company. At the time, it was quite popular for foreign companies to buy up historic American watch companies.

WALTHAM CDIA (Civil Date Indicator Aernautical) · At the beginning of the Second World War, the clock provisions for the United States Army coming from.

Grandfather clocks, also called longcase clocks by horologists, were invented after Dutchman Christiaan Huygens applied a pendulum as a clock-winding device in But it wasn’t until about when clockmakers mastered the workings of the pendulum for accurate timekeeping in conjunction with an anchor escapement — the mechanical device that gives a pendulum its swing. If you own a longcase clock, determining its age can tell you how much it is worth.

After , most clocks were mass-produced by German and American manufacturers, effectively putting an end to the valuable custom-made grandfather clocks. English clockmakers crafted clocks with brass dials from about to Early brass-dial grandfather clocks had only one clock hand, since to clock owners, the hour of the day was more important than minutes. By , grandfather clocks with two hands began showing up in England, even though outlying villages and country regions still had clockmakers crafting clocks with only the hour hand.

From through , brass dials became more ornate and contained other features such as second hands, date hands and wheels.


HistoricTimekeepers Restoration Services and Supplies. To see images full size right click and select “view image” or “view image in new tab” Depending on browser. Notes for Young Watchmakers. This is the clock found in the Corsairs and other late Pacific theater aircraft.

Waltham CDIA (Civil Date Indicator, Aeronautical). WWII Waltham USN CDIA Clock. If you have a Waltham CDIA clock you need serviced, you will find services.

The humble date is one of the most ubiquitous complications in all of horology, so much so that it is almost taken for granted. In this installment of Complications , we look at when dates first appeared, why they have taken over to such an extent, and a few of the more common variations out there. Calendar complications had existed in pocket watches since the late 19th century, but the first patents for a calendar wristwatch were submitted in by watchmaker A.

Hammerly from the La Chaux-de-Fonds region of Switzerland. By the end of the decade this movement was found in wristwatches from H. Moser and Waltham, among others. Around the same time, Movado began work producing a wristwatch with digital date display — closer to a modern date window display. However, due to the smaller size of watches at that time, the date display may have been difficult to read in many cases. The next major advancement in the date complication arguably took place in when Hans Wilsdorf introduced the Rolex Datejust, claiming it to be the first wristwatch with a self-changing date.

This was improved further in with the date change also becoming instantaneous at midnight rather than a slow-roll over a prolonged period. The instantaneous date change is a feature which has been adopted and deliberately resisted in equal measure, the argument for a slow date change being that a single glance at the dates somewhere between and would not give much useful information unless the time of the instant jump is known to be perfectly accurate.

This dial placement was chosen so that only a small portion of the watch needs to be exposed from underneath a shirt or jacket in order to check the date. The standard date wheels for ETA movements are limited to either black numerals on white background or vice versa, or a seldom seen gold date disc with black numerals.

Dating Rocks and Fossils Using Geologic Methods

Seller Rating:. Soft cover. Condition: Good. A reprint of Hirst Brothers and Company of Manchester catalogue of clocks from around In clean and sound condition.

Here is a fine example of a WWII-era CDIA Aircraft Clock, 8 day, hour-dial, made by Waltham. According to the Waltham website: Approximately

Approximately The crystal glass was secured by a bezel and gaskets to seal the movement against dust. The winding and setting crown was positioned adjacent to the quick set button. The dial had a lusterless black finish with printed indexes and numbers. A Munsell Green paint was used on the odd-hour numerals, minute indexes, and the civil date and numerals indexes.

A yellow fluorescent material was used on the eve-hour indexes and numbers and the diamond-shaped, odd-hour indexes. Respectively, the civil date had the words 8-days and Civil Date in green; the hour, minute, and sweep second hands were also painted with yellow fluorescent material. The civil date, day sub-dial was located at the center of the main dial, with numerals and indexes. Large Arabic numerals indicated the even-numbered hours and, small Arabic numerals indicated the odd-numbered hours.

Complications: Dates

The Find Serial tab requests a serial number and displays the detailed information about that number on the same page. The information includes links to the page or pages that provided the core information. The Search tab provides a general search based on the value or values you enter in the fields.

The extraordinary Waltham Civil Date Indicator Aeronautical fitted the US airplanes F6F Hellcat and B24 Liberator. It had 8 day mechanical movement.

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. From Wikimedia Commons, the free media repository.

File information. Structured data. Captions English Add a one-line explanation of what this file represents. Summary [ edit ] Description Bishop’s Waltham clock. You cannot overwrite this file.

Current Local Time in Waltham, Massachusetts, USA

This page has been archived and is no longer updated. Despite seeming like a relatively stable place, the Earth’s surface has changed dramatically over the past 4. Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free. These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth’s surface is moving and changing.

As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils. A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.

I’m trying to put a value on a waltham railway clock that I own. Any suggestions? Name: M. Goodman Email: [email protected] Date: June 07, Message.

Waltham watches values vary tremendously. Finding the value of a Waltham or any collectible watch needs to take into account many factors. The Waltham Watch Company, also known as the American Watch Company, made over 40 million watches, clocks and other precision implements between the years of and The watches are highly collectible and people often want to know Waltham watches values. The value of any watch takes into account the condition of the watch, demand for the watch and how many are available for purchase.

The best way to find the value of a Waltham watch is to take the watch to a professional and qualified watch dealer and valuer. There are many individuals and companies that specialize in vintage and antique watches. In order to find out Waltham watches values, a valuer will consider the following:. Each Waltham watch was given a serial number. This serial number will tell a little about the watch and is useful information to know when looking to find out the value of a Waltham watch.

It is important to look at the serial number of the watch movement and not any number on the case. This serial number can be used to find out the date the watch was made and any other information that may have been taken from the ledgers of the Waltham Watch Company.

Waltham Pocket Watch Serial Number Lookup

This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Hi I know a lot of you collect military pilot watches and maybe the clocks that went in the aircraft I just got a waltham C.D.I.A. clock WW2 era at a.

The pendulum stick has original gilding; the bob has concentric engraved circles; both original to the clock. It seems that the next-to-largest sizes of some Howard regulators are harder to find than their “bigger brothers”! Just wish we had available wall space to keep this one! Both E. The original Howard catalogue said, they ” Ya think?

The case is in excellent overall condition. It measures

Waltham Clocks

Many stopped clocks can be easily repaired by the owner. Here is a list of common problems that are simple to repair. Although the following instructions specifically apply to antique British clocks, they will also work for many other clocks. Keep in mind that while some repairs can be repaired easily, sometimes it is best to let an expert repair your clock to help avoid additional damage.

First, make sure your clock is wound up.

A broken church tower clock dating back to the s could be repaired by Easter, it has been revealed. The clock at Waltham Abbey Church in.

The revolutionary business plan was to manufacture the movement parts so precisely that they would become fully interchangeable. Based upon the experience of earlier failed trials, Howard and Dennison would eventually perfect and patent their precision watch making machines and create the American System of Watch Manufacturing. In , according to some sources, the company took the name “American Horologe Company” and production started in the new factory building.

However, in October , Waltham co-founder, Aaron Lufkin Dennison, in a letter to author Crossman, refuted the name and stated that the first Company name was the Warren Manufacturing Company, named for General Warren of Roxbury, a famous soldier of the War of Independence. The word “watch” was specifically omitted to retain secrecy of the novel operation. Late , the first watches were complete. Number-1 given to Edward Howard resides in the Smithsonian Collection.

Numbers 18 to were named “Warren, Boston” and the following “Samuel Curtis”, after the financial backer. January saw the introduction of the “P. Bartlett” watch named for an early employee Patten Sargeant Bartlett. The company was renamed Boston Watch Co.

1928 Waltham 8 Day Travel Clock