Omega Seamaster f300Hz electronic tuning fork chronometer calendar wristwatch manufactured in 1970, in superb original un-restored condition down to the signed crystal. The case, dial and movement are in excellent condition. I am sure that to have remained in this condition, the watch just cannot have received regular use over the last forty eight years. The movement runs strongly and keeps time and the quick set date function operates correctly. The watch is signed five times on the case, dial, crown, movement and crystal.
The movement in this watch is a cal. ESA 9162 (called the cal.1250 by Omega) electronic tuning fork mechanism, not a quartz movement. The ESA 9162 movement is considered by aficionados to be the “Rolls Royce” of tuning fork movements. It was designed by Max Hetzel, who worked for Bulova and was responsible for designing the Accutron 214. The "f300Hz" on the dial refers to the frequency of the tuning fork which provides chronometer precision in timekeeping. It is similar to the Bulova Accutron tuning fork movement but is considered to be of better quality and reliability. The ESA 9162 and its derivatives were used by several high end watchmakers in the 1970's, before quartz watches came to dominate the market, including IWC, Longines, Baume and Mercier, Zenith and Universal Geneve.
Dial: in great original un-restored condition, with a two tone matt dark grey finish and hours marked by applied silver coloured batons. The dial is signed "Omega Electronic f300Hz Seamaster Chronometer Swiss Made". It also bears the Omega emblem. The hands are in excellent condition and the original crystal bears the Omega emblem etched into the centre. It is clean and clear.
Case: made of stainless steel, in excellent condition, measuring approximately 36 mm across, excluding the signed crown and 43 mm from lug to lug. Looking inside the screw back cover it is signed "Omega" . The case shows the inevitable signs of careful and clearly infrequent use over the years but absolutely no signs of abuse, dents or scratches of any significance that I could see to draw to your attention.
Movement: ESA 9162 tuning fork calendar movement, named by Omega as their cal. 1250. It is running strongly and keeping time with the quick set calendar function operating correctly. The serial number, dates the watch to 1970. If you hold the watch to your ear you can hear it humming. Batteries for this watch are readily available.
Strap: lightly used generic black leather strap which attached to the watch measures approximately 214 mm from buckle tip to last hole.