Omega F300Hz Chronometer FS

Stainless steel Omega Electronic F300Hz Chronometer 'Tunning Fork hummer' for sale.
Nice clean condition. Some minor marks on the dial (near the 'f'). Recently serviced, new battery and new genuine Omega crystal. I'm not convinced the bracelet is original, but it looks the part and has an Omega clasp cover.
Case Ref: 198.0070.169/ 398.0835.169
Cal.1250
A mere £350 gbp shipped anywhere in the world (please email for a quote if from elsewhere)
(I was going to say it's going cheap, but its more of a Hhmmmm sound.)

Price and details?

Sorry - details are in the middle of the pictures. Had a little trouble with the uploads - I'm a simple creature.

Open to offers.