Seiko Gen 1 (1st Generation) 7A28-7120 Royal Air Force flight crew issued military analog chronograph

Seiko Gen 1 (1st Generation) 7A28-7120 Royal Air Force 

flight crew issued military analog chronograph watch 

The Seiko Gen 1 (1st Generation) 7A28-7120 Royal Air Force flight crew issued military analog chronograph watch was the first quartz chronograph watch issued to Her Majesty’s armed forces, with October 1984 being the first date of issue. 

This piece produced in August 1984 is thus one of the first issued of a total run of 11,307 Gen 1 chronographs, which were not replaced until November 1990.

The caseback is inscribed with the "broad arrow" and NATO Stock Number (NSN) ‪6645-99 7683056‬ used for military-issued equipment: 

6645 = Time Measuring Instruments
99 = NATO Country code United Kingdom
768-3056 = individual part number

In contrast to the commercial versions, the issued version has a 37mm diameter case with matte, bead-blasted finish, fixed strap bars and a "circle P” dial, indicating radioactive Promethium lume. 

The ‪3:00‬ o’clock register measures ‪1/10‬ths of a second, while the large center hand measure elapsed seconds.  The ‪9:00‬ o’clock register records chronograph minutes up to 30 while the bottom register is a continuous seconds hand.

The 7A28 (Gen 1) reference is Seiko's first analog chronograph, impressively over-engineered with metal gears and a 15-jewel movement which is able to be serviced and maintained. It takes a SR936SW (394) 9.5 x 3.6mm battery.

The Gen1 was originally issued on a nylon/leather Bund type (NSN 6645-99-527-7059) strap, which was later replaced with a nylon NATO (6B/2617, and NSN 6645-99-124-2986. Post war RAF straps also included the steel Bonklip (6B/2763 (17.5 mm), 6B/3224 (19.0mm), which were phased out in the early eighties but remained in issue until existing stocks were depleted.

1961 Omega Constellation "Pie Pan" Chronometer Full Set

1961 Omega Constellation "Pie Pan" Chronometer

This steel, no-date1961 Constellation was sold at Thule Air Base, Greenland in 1962, has the original Omega box, full papers and original Omega stainless steel bracelet with folding clasp, and boasts the chronometer grade, self-winding, 24 jewel caliber 551, adjusted to 5 positions and temperature.

On its beads-of-rice bracelet, this watch wears more substantially on the wrist than its 35mm, making it the ideal dress watch for special occasions!

1964 Rolex ref1002 Oyster Perpetual Chronometer

1964 Rolex Oyster Perpetual Chronometer

This 1964 Rolex Oyster Perpetual Chronometer is stunning, with its rarity and collectibility due in part to its Dauphine hands and original rivet bracelet, dated I-65.

There is no 7205 stamp on the back of the largest link (correct for the period) and the clasp blade is stamped with the year (1965) to match this. I have never used the original bracelet in order to preserve its pristine condition, and I wear this watch on an additional aftermarket Oyster bracelet for daily use.

The original tritium dial is correctly marked "T SWISS T" (for pre-1965) with tritium plots. The dial is in excellent condition, with minor age marks visible under the loupe. The rare Dauphine hands show signs of aging, visible under the loupe.

The cal 1560 with its Microstella screws and Bregeut free-sprung hairspring was used until 1965 in a number of chronometer-certified models, including the legendary Rolex 1016 Explorer and the Rolex 5512 Submariner. The movement is clean, and accurate to a few seconds a day.

This watch comes with an original Rolex box, cigarette card, Bucherer Rolex spoon as well as a 1960s advertisement extolling the Rolex Oyster Perpetual 1002 as the chronometer chosen by Sir Francis Chichester to accompany him on his single-handed circumnavigation of the globe in 1966.