Dating longines watches by serial number

It seems most logical to structure this section so that the chart itself is accessible with a minimum number of clicks in order that returning browsers can refer back to it in the most direct fashion.To give a little bit of background detail, the original Rolex case back signature was “W & D”.

I believe that watch collecting is addictive, so be warned!If you want to get started as a collector, know that you may find them in antique shops, weekend fairs, garage sales, e Bay, websites, and auctions galore (such as Sotheby’s, Christie’s and others).As time allows and indeed, as new watches are sourced for stock, we will photograph their case back markings and add them to the table here.Oyster Watch Co, Geneva-Swiss, Great Britain Patents, Swiss Patents, French Patents, USA Patents, German Patents. Case maker Union Suisse des Fabricants de Boites de Montres ( USFB) Oyster Watch Co, Geneva-Swiss, Great Britain Patents, Swiss Patents, French Patents, USA Patents, German Patents. Case maker Union Suisse des Fabricants de Boites de Montres ( USFB).Presumably to avoid confusion among their existing customers, the new company then went through quite a long stage of having both Rolex and W & D stamped dually into its case backs.

When more additions to the accompanying chart have been made, we should get a fairly definitive record of when the W & D stamp was finally laid to rest and only the Rolex name stated on its own, but provisionally, it seems likely that this phasing out began in around 1918 and was all but completed by mid-1920.As far as we are aware, nobody has ever tried to put these into strict chronological sequence before, so this exercise is venturing into uncharted territory.Hopefully, it should be useful as an aid to weeding out those watches that have wildly different case back markings to others from the same year, this suggesting that they merit further scrutiny to confirm their originality.So, for instance, II.53 would tell us that the watch was manufactured in the second quarter of 1953.Again, hopefully the process of recording case back stamps in this way should allow us to spot any other variations that exist from this period.Obviously, it is a very competitive market, and some watches may sell for thousands, hundreds of thousands or even millions of dollars, as is the case of very rare watches – think about Winston Churchill’s Lemania gold chronograph from 1946, recently sold at Sotheby’s: its pre-auction estimate was US,000-32,000, but the hammer dropped at over US8,000.