1989 issued Seiko Chronograph, Made for Royal Air Force pilots from 1984 until 1990. All pushers work and the Renata Quartz movement runs great!
The watch comes with two nylon NATOS, One being a recently discontinued Phoenix admiralty grey strap and the other being a vintage 1982 falklands war era strap. Please examine photos closely before purchasing. Let me know if you have any questions!