A 1960's Nivada Grenchen Chronomaster Aviator Sea Diver is up for sale in wonderful condition, with full service and seals replaced.

• Condition: wonderful condition
• Bracelet: Original NOS bracelet
• Crystal: Original crystal but has had scratches polished off
• Case: A few scratches on the case from use

A circa 1960s Nivada Grenchen Chronomaster Aviator Sea Diver Chronograph featuring a robust manual Valjoux movement, bi-directional friction bezel, and tritium on the dial. This era of time pieces combines utility with charm.

• Case size: 38.5mm
• Movement type: manual Valjoux

This is a mechanical hand wound Nivada Chronomaster Aviator Sea Diver Orange Boy Chronograph in mint condition, with very minor strap changing marks on two of the lugs.

• Condition: Mint condition
• Model type: Mechanical hand wound

A Nivada Grenchen Chronomaster Aviator Sea Diver Chronograph from the 1960s featuring a manual Valjoux movement and unique design elements such as brad arrow hands, recessed sub dials, and a bi-directional friction bezel.

This era of time pieces has a lot to offer as they appeared to make the all-in-one utility tool: diver, pilot, chronograph. The charm is evident in the brad arrow hands, recessed sub dials and the dash of red 30 minute subdial for timing regattas—extra sauce—the tritium on the dial has aged a perfect golden pie hue and the bi-directional friction bezel, showing 60-minute elapsed time as well as a GMT function is faded from rotation.

• Condition: Used circa 1960s (no service history)
• Case size: 38.5mm
• Lug width: 20mm
• Movement type: Manual Valjoux

This timepiece comes from an interesting era of Chronographs and vintage tool watches. Not only were these pieces fitted with fine movements and keenly designed dials, but there is also design language and production overlap— specifically ranging from Nivada Grenchen, Croton, and Bulova.

• Condition: Honest wear and no damage
• Movement: Valjoux Cal. 7733
• Crown Type: Bulova crown
• Service History: Unknown