An Omega Speedmaster Olympic Games collection chronograph wristwatch; ref. 321.10 in stainless steel with white dial, Arabic numerals, lume broad arrow hands, tachymeter bezel, registers for seconds, 30 minutes and 12 hours, chrono seconds hand has Olympic rings counterweight, date, C0-Axial calibre 3313 self wind movement, case diam. 42 mm, with box.