Vintage Watches: A 1956 Rolex Oyster Perpetual Ref. 6567, A 1960s Croton Nivada Grenchen Chronograph Aviator Sea Diver, And A 1960s Universal Genève Uni-Compax ‘Big Eye’ A last minute chance to give the gift of time to your Valentine. Continue reading ‘Vintage Watches: A 1956 Rolex Oyster Perpetual Ref. 6567, A 1960s Croton Nivada Grenchen Chronograph Aviator Sea Diver, And A 1960s Universal Genève Uni-Compax ‘Big Eye” 0 Posted In: Uncategorized