A GOLD CIRCULAR WRISTWATCH, Audemars Piguet, CIRCA 1978

18k, nickel lever movement (Cal. 2090), 20 jewels, mono-metallic balance, adjusted to heat, cold, isochronism and 5 positions, gold-coloured brushed dial with applied baton numerals, baton hands, polished circular case with down-turned lugs, snap on case back, case, dial and movement signed.