Hamilton Electric Nautilus 503 Or 508 Stainless Steel Watch

Offered is this FULLY SERVICED (ultrasonic wash, rinse, and lubrication) Hamilton Electric Stainless Steel Nautilus 503 or 508 watch. The only difference in the two models was the design of the bracelet. Pictured in René Rondeau's book "The Watch Of The Future" on page 184 and 185, the 503 was released in January 1964 with original price of $79.50, and the 508 was released in December 1962 with the same $79.50 price. It is signed on the dial, case, movement, and crown. It runs great and keeps time to well under 30 seconds variation per day and has a brand new battery just installed. The hack function works properly, and the watch starts right up each time the crown is pushed in from the setting position to the running position. As a plus, it has had a BRAND NEW OLD STOCK D-PIN installed in the balance, so it will run virtually as it did from the factory. BRAND:  Hamilton Electric Nautilus 503 or 508 GENDER:  Mens CASE:  Stainless Steel CASE BACK:  Marked Hamilton, Stainless Steel, insc