Hamilton Electric 507 Calendar PROTOTYPE Watch
Offered is this very rare Hamilton Electric PROTOTYPE 507 CALENDAR watch. Pictured in René Rondeau's book "The Watch Of The Future" on pages 92-93, it was planned in 1965 and 1966, but never released to the market.
Approximately 25 of these prototype watches were produced, but concerns that an even more complicated watch would result in even greater service problems and the addition of thickness to an already thick 505 movement caused production to be terminated. These watches are extremely rare and a great prize for a Hamilton Electric collector.
This model runs and keeps excellent time and all functions work properly.
The watch window moves and follows the date until it flips at midnight. It is interesting that with this feature, it can actually be told whether it is am or pm. For instance, since as pictured the date is on the upper middle portion of the window, you can surmise that it is 10:07 AM rather than PM.
Consider the rarity of the Altair, with 1600 total produced vs. the Calendar 507 with a mere 25 ever produced.
BRAND: Hamilton Electric 507 Calendar Prototype
CASE: Stainless Steel
CASE BACK: Marked Hamilton, Stainless Steel, and inside marked Hamilton W. Co., Lancaster, PA, Stainless Steel, P189554, Star W.C. Co., 892967
BAND/BRACELET: Used Hamilton genuine Alligator Black Band with matching stainless steel buckle marked Hamilton
MOVEMENT: 507 electric, marked Hamilton 507, Pat., ADJ, USA
SIZE: 34mm without crown, 38mm lug to lug | 10mm thick not including the crystal
CROWN: marked with the "H" logo
CRYSTAL: Excellent, with no cracks
CASE: Excellent, shows virtually no wear
DIAL: Excellent original finish, with date window at 3, marked Hamilton Electric
HANDS: Black Hour and Minute Hands, and red seconds hand, all correct for this watch
BAND: Used, Excellent
Guaranteed to arrive in perfect running order, or money back upon return, or return for any reason within 7 days for a full refund. However, since many parts are not available for this watch, I cannot give it a six month guarantee on the movement. I am a NAWCC (National Association of Watch and Clock Collectors) member and stand behind what I sell.