San Martin · Factory brand · China
San Martin SN0131 39.5mm
- Seiko NH35A
- 39.5 mm × 11.7 mm
- Sapphire crystal
- 100 m water resistance
Where to buy
- San MartinWorldwide
Movement
- Caliber
- Seiko NH35A
- Type
- Automatic
- Tier
- Entry
- Complications
- Hours, Minutes, Seconds
- Frequency
- 21,600 bph
- Power reserve
- 41 h
- Hacking
- Yes
- Accuracy (factory)
- -20 / +40 s/day
Case
- Diameter
- 39.5 mm
- Lug to lug
- 46.5 mm
- Thickness
- 11.7 mm
- Lug width
- 20 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 100 m
- Crown
- Screw-down
- Case back
- —
- Bezel
- Fixed
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- BGW-9 blue, on hands and markers
Bracelet & clasp
- Style
- Beads of rice
- Links per row
- 7
- Solid end links
- —
- Solid links
- Yes
- Link attachment
- —
- Taper
- 20 → 16 mm
- Quick release
- —
- Half links
- —
- Clasp
- —
- Micro-adjust
- On-the-fly, "Fly Adjustable Clasp"
- Diver extension
- —
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
- Stated weight (basis not given)
- 140 g
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| Gradient Black Grid | — | Street | 258 USD | $258 | 2026-10-24 | link |
Variants
| Name | Reference | Dial |
|---|---|---|
| Gradient Black Grid | SN0131-G | gradient grey to black with pressed grid pattern |
About this entry
84% of key specs known. Missing: hardening, end links, link attachment.
Brand specs (spec list writes the model "SN0131G"): 316L, 39.5mm, 46.5mm lug-to-lug, 11.7mm (not stated whether that includes the crystal), 20mm lugs, sapphire with AR coating (side not stated), brushed 316L bezel (plain and fixed in the photos), gradient black "oil pressure grid pattern" dial, BGW-9 blue lume, screw-down crown with hexagon logo, screw-down caseback with circular brushing, 100m, seven-link solid 316L bracelet 20mm tapering to 16mm (beads-of-rice in the photos) with the "New Fly Adjustable Clasp" (on-the-fly; positions and range not stated), about 140g (not stated what was weighed). The NH35 has a date but the dial shows no date window, so complications are time only. The listing's attributes name "Matte Black" and "Matte Grey" dials but it has no colour options to buy and the photos show one gradient grey-to-black dial. Price $258 on 2026-10-24; the listing showed "Out of stock" on 2026-10-25, so production status is unknown.
Last verified: 2026-10-25. Edit or correct this entry.
Sources
- San Martin official store, SN0131-G 39.5mm NH35, grid pattern dial accessed 2026-10-25