Timex quartz dating chart list of accommodating resistance machines

This will give a good idea of the manufacture date.

timex quartz dating chart-83timex quartz dating chart-23

Timex quartz dating chart

Seems to occur most frequently with Omega Speedmaster Mark II models. We hope you enjoy our new site here at i Already Havea

" We hear that a lot here at Watch Sleuth so we built this page to help you figure it out. If you don't know how to find these numbers on your watch please read our instructions below. We encourage people to send us additions and corrections.

Data adapted with permission from “Omega Speedmaster Evolution” by Roman Hartmann.

Data may not be accurate for Limited Edition Speedmasters and Speedmasters with cal. This serial number data item not given in Hartmann’s data but empirically derived from a consensus of users in various internet Omega collector forums. We had finally outgrown our old home and it was time to move.

These watches are typical of the "Deco" style of the teens and 20's.

The Elgin and Hamilton were dated by serial number, while the Gruen was dated by an inscription on the back. In the 1930's there was a style change from highly engraved cases to smoother cleaner lines.

: In the 1950's Bulova incorporated a symbol system to date the watches they manufactured.

These numbers are stamped on the back (outside) of the case. The code was usually stamped on the back of the watch case.

Many have gone out of business, while others destroyed records to save space.

Some companies (as with the Gruen Watch Company), even lost rocords to fire or other natural disaster. I am sure they had no idea that their timepieces would someday be collected.

Serial number records are available for many of the old pocket watch companies like AM Waltham, Elgin, South Bend etc. The number you need is the serial number stamped on the MOVEMENT (i.e the inner workings).

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