San Martin · Factory brand · China
San Martin SN003 47mm (NH36)
- Seiko NH36A
- 47 mm × 15.2 mm
- Sapphire crystal
- 300 m water resistance
Where to buy
- San Martin (SN003-G Black)Worldwide
- San Martin (SN003-Q Bronze Black)Worldwide
Movement
- Caliber
- Seiko NH36A
- Type
- Automatic
- Tier
- Entry
- Complications
- Date, Day
- Frequency
- 21,600 bph
- Power reserve
- 41 h
- Hacking
- Yes
- Accuracy (factory)
- -20 / +40 s/day
Case
- Diameter
- 47 mm
- Lug to lug
- 47 mm
- Thickness
- 15.2 mm
- Lug width
- 22 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 300 m
- Crown
- Screw-down
- Case back
- Solid, screw-down
- Bezel
- Unidirectional, 60-minute dive
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- Super-LumiNova C3
Bracelet & clasp
- Style
- —
- Links per row
- —
- Solid end links
- —
- Solid links
- —
- Link attachment
- —
- Taper
- —
- Quick release
- —
- Half links
- —
- Clasp
- —
- Micro-adjust
- —
- Diver extension
- —
Straps
- Strap 1
- FKM rubber, 22mm tapering to 20mm
- Strap 2
- Leather, SN003-Q only, with bronze pin buckle
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
- Stated weight (basis not given)
- 145 g
Prices
Variants
| Name | Reference | Dial | Bezel |
|---|---|---|---|
| SN003-G Black | SN003-G | black | solid 316L steel, steel shroud |
| SN003-Q Bronze Black | SN003-Q | black | bronze, bronze shroud |
About this entry
74% of key specs known. Missing: hardening, bracelet links, end links, link attachment, clasp micro-adjust.
Tuna-style SN003 with a shroud ("armor") over a 316L case: 42mm without the shroud and 47mm with it (the brand also gives 47mm lug-to-lug), 15.2mm including crystal, 22mm lugs, 300m. Both listings name an NH36. SN003-G (steel shroud and solid steel unidirectional timing bezel): matte black dial with no day or date window, sandblasted hands, SLN C3 lume, sapphire with AR coating, screw-down crown and caseback with 3D shark logo, about 145g (not stated what was weighed), FKM rubber strap 22/20mm or a stainless steel bracelet (details not stated) with a signed 316L buckle; with or without logo at the same price. SN003-Q: the same 316L case with a bronze shroud, bezel and crown, C3 lume, leather or FKM strap with bronze pin buckle; its "Double Calender" option (black dial, day and date at 3) is this model, while its "Single Calender" blue and green dials are in sn003-nh35. The AR coating, bezel direction and weight are stated only on the SN003-G listing. Because SN003-G hides the day and date while SN003-Q shows both, complications are left to the movement. The dials of SN003-Q read "Marine Master Professional 300m", after Seiko's Tuna. Every variation showed "Out of stock" on 2026-10-24, so production status is unknown. The NH35 versions of this case are in sn003-nh35.
Last verified: 2026-10-24. Edit or correct this entry.
Sources
- San Martin official store, SN003-G (NH36) accessed 2026-10-24
- San Martin official store, SN003-Q bronze (NH36; "Double Calender" option) accessed 2026-10-24