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Merkur MONOBLOCK TUNA
Case
- Diameter
- 47mm
- Thickness
- 17mm
- Lug-to-lug
- 48mm
- Lug width
- 20mm
- Material
- Stainless Steel
- Water resistance
- 200m
Crystal & dial
- Crystal
- Sapphire
Movement
- Caliber
- Seiko NH35
- Type
- Automatic
- Power reserve
- 40h
- Hacking
- No
- Hand-winding
- No
- Complications
- Time only
Seiko
Seiko's third-party supply version of the 4R35, sold to external watch brands and modders worldwide. Adds hacking and hand-winding over the 7S26 it effectively replaced. The NH35 has become the default automatic movement for watch modding and microbrand watches, thanks to its low cost, reliability, and wide availability of compatible parts including dials, hands, and cases in the Seiko-compatible format.
Dive collection · 4 watches
2 colorways
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In a nutshell
The Merkur MONOBLOCK TUNA is an automatic diver watch, with a 47mm stainless steel case, 17mm thick, powered by the Seiko NH35 movement and a 40-hour power reserve. Water resistance is rated to 200m, under a sapphire crystal. Manufacturer MSRP is $279.
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