Stainless steel. Diameter including crown: circa 4.2 cm, inner circumference: circa 19 cm. Circa 106.35 g. Together with: Guarantee booklet. Round case, black dial signed Omega Speedmaster Professional Swiss Made, luminous baton hour indications, pointed baton hands with luminous inserts, subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, outer minute divisions with 1/5th second markers, bezel with tachymeter scale. Manual wind movement. Ref No. ST 145.0022 and 44 821 268, Movement No. 121 163.