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1970s Cushion-Case Seiko Diver
This is a 1970s Seiko cushion-case diver, the reference 6105-8110 often referred to as the “Willard.” The design reads as purposeful: a rounded cushion case of ~43 mm, a locking crown at 4 o’clock, bold diver markers and a rotating bezel, fitted on a tropic-style rubber strap with a period-correct mineral Hardlex crystal. Power comes from Seiko’s in-house Cal. 6105B—an automatic, date-equipped, hacking movement with 17 jewels and a ~21,600 vph beat rate—freshly serviced on 27.09.2025 with a service certificate included. For today’s wearer it offers authentic vintage diver character and a recently overhauled movement, though vintage water resistance is not guaranteed.
Watch dossier
Important details, without the clutter.
01Specifications+
- Brand / model
- SEIKO SEIKO Capitan Willard Ref. 6105-8110
- Reference
- 6105-8110
- Estimated production
- 1970s
- Case material
- Stainless steel
- Case diameter
- 43 mm
- Dial
- Original Seiko diver dial and hands; date at 3; even vintage wear (see photos)
- Crystal
- Mineral (period-correct Hardlex); clean user wear
- Crown
- Signed locking crown at 4 o’clock; functions correctly
- Strap / bracelet
- Tropic-style rubber 20 mm
- Movement
- Automatic (date, hacking)
- Caliber
- Cal. 6105B
- Jewels
- 17
02Service & provenance+
Last serviced: 27 September 2025
The service includes the following operations: • Disassembly of the watch • Movement overhaul: dismantling • Cleaning, reassembly and lubrication • Use of Moebius synthetic oils • Ultrasonic cleaning of the case • Reassembly of the case and the watch • Final technical and aesthetic checks
03Delivery & returns+
Current store policies apply to this purchase.
Included with the watch