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STEELDIVE SD1978
Ref. SD1978
$218Stock unknown
Case
- Diameter
- 53.6mm
- Thickness
- 17.85mm
- Lug width
- 22mm
- Material
- Stainelss Steel
- Water resistance
- 1000m
Crystal & dial
- Crystal
- Sapphire
Movement
- Caliber
- Seiko NH35
- Type
- Automatic
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.
Design language
- Case shape
- round
- Dial style
- standard
- Bezel
- rotating_unidirectional
- Bracelet
- metal_oyster
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The market
Market prices.
Retail$218
eBay listings
- Steeldive SD1978 Emperor Tuna 1000M Auto Mechanical Diver Watch Sapphire NH35New with box and papers · GB$291
- Steeldive SD1978 Emperor Tuna 1000M Automatic Diver Watch Sapphire NH35 24 JewelNew with box and papers · GB$291
- Steeldive SD1978 Emperor Tuna 1000M Automatic Dive Watch Sapphire NH35 24 JewelsNew with box and papers · GB$291
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In a nutshell
The STEELDIVE SD1978 (ref. SD1978) is an automatic watch, with a 53.6mm stainelss steel case, 17.85mm thick, powered by the Seiko NH35 movement. Water resistance is rated to 1000m, under a sapphire crystal. Manufacturer MSRP is $218.
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