Grand Silverstone, Ref:2GS1AS, No.137, Circa 2005
28-jewel Cal.G.1721 automatic movement, black dial with luminous Arabic numerals and black outer 1/5th second divisions on silvered ground, outer tachymeter scale on black ground, polished pointed baton hands with luminous inserts and centre chronograph hand, small red centre second time zone, subsidiary dials at 3 and 9 for running seconds and 30 minute recording, date apertures at 6, polished round case with back secured by six screws, brushed concave bezel, screw down crown flanked by twin pushers, fitted Graham black rubber strap and polished Graham buckle, together with fitted Graham box, outer card and guarantee booklet, case, dial and movement signed
44mm.