A Seiko 'Bullhead' 5 Sports Speed-Timer Automatic stainless steel cased gentleman's wristwatch, Ref. 6138-0030, circa September 1975, with signed and jewelled 6138B caliber movement, the signed brown dial with white baton hour markers, two gilt subsidiary dials and day and date apertures, the case with brown tachymeter scale bezel, the case back detailed '6138-0030' and numbered '591396, case width 4.4cm.