Omega. A stainless steel manual wind chronograph bracelet watchModel: Speedmaster ProfessionalReference: 145.022Date: Circa 1970Movement: 17-jewel Cal.861 manual wind, No.2943096Dial: Black, lumino baton hour markers, white outer 1/5th second divisions, subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, white pointed baton hands with lumino inserts, centre chronograph handCase: Brhed and polished tonneau form, screw down back, black tachymetre insert to bezel, crown flanked by twin phersStrap/Bracelet: Brhed and polished 1171 Omega linkBuckle/Clasp: Signed folding claspSigned: Case, dial & movementSize: 42mmApaniments:Omega boxFor further information on this lot please visit theProvenance: The current reference of Speedmaster was produced between 1968 and 1988, with vario suffixes after 145.022 accounting for minor changes to the model. The watch hoes the calibre 861, an updated version of the iconic calibre 321.