Omega, Massive and Rare Seamaster "Big Blue" Chronograph, Ref. 176.004, circa 1973 Case: 44mm, stainless steel, three body case, with screw down case back Dial: blue dial, with subsidiary dials for running seconds/24 hour indicator, 12 hour indicator, minute counter scale on periphery, white luminous hands Movement: Omega cal. 1040, self-winding, gilt finished, 22 jewels, No. 36256644 Band: Omega signed heavy mesh diver bracelet on quick release diver clasp #1247/237 Signed: Omega on case, dial, movement HID03101062020 © 2020 Heritage Auctions | All Rights Reserved