Rolex “Twinlock” and “Triplock” crowns
One of the most important and unique features of the Oyster case is its famous crown. The “Twinlock” crown is used on all regular models… Read More »Rolex “Twinlock” and “Triplock” crowns
John
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The Anti-Shock mechanism on the watches
Anti-shock assemblies are used to protect the upper and lower balance pivots from damage due to external impact on the watch. In some movements, shock… Read More »The Anti-Shock mechanism on the watches
Rolex caliber 1210 movement – specifications and photo
Rolex 1210 is Swiss manual-winding movement from 1950’s to 1960’s. sweep second Manual-winding movement with 17 jewels f = 18000 A/h Power reserve: 58 hours Diameter: 23.2 mm View… Read More »Rolex caliber 1210 movement – specifications and photo
Lemania caliber 1340 movement – specifications and photo
Lemania 1340 is Swiss movement from 1960’s. Automatic chronograph, 60s, 60min, 12h, cam switched, center-minute and -second sub second, date: quickset, 24h display Automatic movement with 17… Read More »Lemania caliber 1340 movement – specifications and photo
Venus 175 movement – specifications and photo
Venus 175 is Swiss movement from 1960’s. There are two options with 30 and 45 minutes indication on the chronograph. 2 registers on the dial… Read More »Venus 175 movement – specifications and photo
Seikosha military clocks and watches
Seikosha military clocks and watches Aircraft Clocks These clocks were manufactured by Seikosha and feature a pre-1940 brass case and hinges. Note the post-1940 patent… Read More »Seikosha military clocks and watches
Longines caliber 13.34 movement – specifications and photo
Longines 13.34 is Swiss manual-winding movement from 1910’s to 1930’s. Sub-dial for the seconds Ligne: 13 Manual-winding movement with 15 or 18 jewels f = 18000 A/h Diameter: 28.8 mm… Read More »Longines caliber 13.34 movement – specifications and photo
Zenith caliber 143-6 movement – specifications and photo
Zenith caliber 143-6 (Excelsior Park 4) is Swiss manual-winding movement from 1940’s. Triple chronograph Dial indication – 60s, 30/45 min, 12h Manual-winding movement with 17 jewels f =… Read More »Zenith caliber 143-6 movement – specifications and photo
Omega caliber 503 movement – specifications and photo
Omega 503 is Swiss automatic movement from 1950’s to 1960’s. Date – changed after rewinding – 24 hours Automatic movement with 19 or 20 jewels f = 19800 A/h… Read More »Omega caliber 503 movement – specifications and photo
Short history of Seiko K. Hattori – Military watches
Short history of Seiko K. Hattori As with most present-day watch producers, watch manufacturer Seiko, did not see a decline after the end of WWII… Read More »Short history of Seiko K. Hattori – Military watches
The First Days and the Evolution of the Mid-500 Series Omega
The First Days and the Evolution of the Mid-500 Series In the 1950s and 1960s, Omega was a progressive and dynamic force in Swiss Watch… Read More »The First Days and the Evolution of the Mid-500 Series Omega
Omega 752 movement – specifications and photo
Omega 752 is Swiss automatic movement from 1960’s to 1970’s. Quickset date Automatic movement with 24 jewels f = 19800 A/h Power reserve: 50 hours Diameter: 27.9 mm… Read More »Omega 752 movement – specifications and photo