SpecStudio
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STEELDIVE SD1977
Ref. SD1977
$139Stock unknown
Case
- Diameter
- 42mm
- Thickness
- 13.45mm
- Lug-to-lug
- 47.8mm
- Lug width
- 20mm
- Material
- Ceramic
- Water resistance
- 200m
Crystal & dial
- Crystal
- Sapphire
Movement
- Caliber
- Seiko NH35
- Type
- Automatic
- Power reserve
- 41h
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
- matte
- Bezel
- rotating_unidirectional
- Bracelet
- metal_oyster
AI-detected from the product image
2 colorways
The market
Market prices.
Retail$139
eBay listings
- Steeldive SD1977 42mm Diver Wrist Watch with Sapphire Glass NH35 200MPre-owned - Excellent · US$120
- STEELDIVE SD1977 — 42MM Thin Abalone AR Coating Sapphire NH35 200M Dive WatchNew with box and papers · US$140
- Seiko NH35 Automatic 42mm Military Dive Watch by Steeldive SD1977 Thin TurtleNew with box and papers · GB$165
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In a nutshell
The STEELDIVE SD1977 (ref. SD1977) is an automatic watch, with a 42mm ceramic case, 13.45mm thick, powered by the Seiko NH35 movement and a 41-hour power reserve. Water resistance is rated to 200m, under a sapphire crystal. Manufacturer MSRP is $139.
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