Omega Speedmaster Professional 'pre-moon' chronograph stainless steel gentleman's wristwatch, ref. 105 012-64, circa 1964, serial no. 2282xxxx, faded tachymeter bezel, 'T Swiss Made T' black dial with centre chronograph seconds, white pointed baton hands and triple subsidiary dials, cal. 321 17 jewel movement, with dust cover, NATO type band, 42mm