Dating us patent numbers

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Robert Allen and artists in his studio were often allocated RA-numbers for their hand-painted wares designed and decorated by them.The RA numbers are mostly hand-written and accompany the standard Doulton marks.Since your serial number falls between those two numbers, you know that your watch was made in 1917 or 1918. Cases and watches were often made by different companies and each usually has its own serial number. Be sure to use the table that is specific to YOUR brand of watch when looking up your serial number.You must use the serial number from the MOVEMENT of the watch... You usually have to take the back off the watch case to see the movement serial number which may appear anywhere on the watch movement. Be sure to use the serial number on the watch movement (the mechanism). Many watch companies made hundreds of thousands of watches, and some companies made millions of watches!It would be impractical to list the individual serial numbers of EVERY watch made... Our serial number tables list RANGES of serial numbers.So you need to figure out the year of production for your Fender guitar or bass. Fenders rank as the most frequently bought and sold instruments on Reverb, and finding a precise date of manufacture can be key to determining the value and specifics of an instrument.The most important thing to keep in mind when dating a Fender is the highly modular nature of the designs.

It shows the first patent number issued in each year, so if you have a patent number, this easily yields the approximate date to begin with.This page contains INSTRUCTIONS for using the serial number look-up tables that are found on many of our watch company history pages.The example below uses information from the American Waltham Watch Company, but that is just an example.RA-1 is repeated twice and it should be noted that the re-setting of the number marries up with the new Doulton lion and crown mark. are many and varied as Doulton marked their wares from the very start.The extensive range of Doulton products meant a reasonably complex set of marks and way of marking was required.

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