Hi all, hoping someone can help identify this vintage Piaget. Outer case back: “FOND ACIER INOXYDABLE”, serial 135100 Inner case back: “PIAGET SWISS”, number 60187 Movement: manual wind, “PIAGET SWISS” on plate, “UNADJUSTED” stamped, “AZM” on balance cock Dating it to ~1965–68 based on the serial. M