Two-tone stainless steel and goldfilled Omega Seamaster chronograph Omega, circa 1970's, is an oversize 38mm x 42mm round button chronograph with an unusual metallic brown dial with luminous hour markers, outer minute/seconds and 1/5th second divisions, outermost tachometer graduated to 700 UPH, subsidiary engine-turned seconds, 12-hour and 30-minute registers. The stainless steel case has a screwdown water-resistant back with Seamaster logo and dedication which can be removed upon request, stainless steel wristwatch with round button chronograph, 12-hour and 30-minute registers and tachometer. 17J manual wind movement, caliber 321, copper color, warrantied by Aaron Faber for 12 months.