Bonhams: Classic sixties and seventies Audemars Piguet and Heuer watches star at Bonhams Knightsbridge auction

Bonhams Knightsbridge Watches and Wristwatches sale includes a rare Audemars Piguet Royal Oak Jumbo around 1975 and an early Heuer Autavia chronograph wristwatch, reference 2446, dating from around 1960.