San Martin · Factory brand · China

San Martin SN003 47mm (NH35)

Ref. SN003-G2-J · Diver

Design reference: Seiko Prospex Marinemaster 300m "Tuna"

San Martin SN003-G2-J tuna-style diver with blue dial and date on blue rubber strap
Photo: San Martin
  • San Martin SN003-G2-J with green dial on green rubber strap
  • San Martin SN003-G2-J with red dial on red rubber strap
  • San Martin SN003-Q with bronze shroud and blue date dial on rubber strap
  • San Martin SN003-Q with bronze shroud and green date dial on leather strap
  • San Martin SN003G-CG with distressed black shroud, red dial and red bezel insert on red rubber strap
  • San Martin SN003G-CG with distressed black shroud, green dial and green bezel insert on green rubber strap
  • San Martin SN003G-CG with distressed black shroud, orange dial and orange bezel insert on orange rubber strap
  • San Martin SN003G-CG with distressed black shroud, light yellow dial and yellow bezel insert on yellow rubber strap
From $235
  • Seiko NH35A
  • 47 mm × 15.2 mm
  • Sapphire crystal
  • 300 m water resistance

Movement

Type
Automatic
Tier
Entry
Complications
Date
Frequency
21,600 bph
Power reserve
41 h
Hacking
Yes
Accuracy (factory)
-20 / +40 s/day

Case

Diameter
47 mm
Lug to lug
—
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
—

Crystal & dial

Crystal
Sapphire
Shape
—
Anti-reflective
—
Lume
Super-LumiNova BGW9 (SN003-G2-J) or C3 (SN003-Q, SN003G-CG)

Bracelet

Bracelet
—

Straps

Strap 1
Rubber, 22mm; FKM on SN003-Q
Strap 2
Leather

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
SN003-G2-J Bluerubber or leather strapStreet235 USD$2352026-10-24link
SN003-G2-J Greenrubber or leather strapStreet235 USD$2352026-10-24link
SN003-G2-J Redrubber or leather strapStreet235 USD$2352026-10-24link
SN003-Q Bronze Blueleather or rubber strapStreet235 USD$2352026-10-24link
SN003-Q Bronze Greenleather or rubber strapStreet235 USD$2352026-10-24link
SN003G-CG Redrubber or leather strapStreet235 USD$2352026-10-24link
SN003G-CG Greenrubber or leather strapStreet235 USD$2352026-10-24link
SN003G-CG Orangerubber or leather strapStreet235 USD$2352026-10-24link
SN003G-CG Yellowrubber or leather strapStreet235 USD$2352026-10-24link

Variants

NameReferenceDialBezel
SN003-G2-J BlueSN003-G2-Jblueblue glass insert, steel shroud
SN003-G2-J GreenSN003-G2-Jgreengreen glass insert, steel shroud
SN003-G2-J RedSN003-G2-Jredred glass insert, steel shroud
SN003-Q Bronze BlueSN003-Qbluebronze, bronze shroud
SN003-Q Bronze GreenSN003-Qgreenbronze, bronze shroud
SN003G-CG RedSN003G-CGredred glass insert, distressed black shroud
SN003G-CG GreenSN003G-CGgreengreen glass insert, distressed black shroud
SN003G-CG OrangeSN003G-CGorangeorange glass insert, distressed black shroud
SN003G-CG YellowSN003G-CGyellowlight yellow glass insert, distressed black shroud

About this entry

67% of key specs known. Missing: lug-to-lug, weight, hardening, AR coating, bracelet offered.

Date-only versions of the tuna-style SN003: a 316L case under a shroud ("armor"), 42mm without the shroud and 47mm with it, 15.2mm including crystal, 22mm lugs, sapphire crystal, screw-in crown with 3D shark, screw-in embossed caseback, 300m. SN003-G2-J (steel shroud, coloured glass bezel insert): enamel "Marine Master Professional 300m" dials, BGW9 blue lume, "Time Module NH35"; the store lists blue, green and red, each on rubber or leather (black, yellow and orange dials and a steel bracelet appear in its option and spec lists but cannot be ordered). SN003-Q (bronze shroud, bezel and crown, C3 lume, leather or FKM strap with bronze pin buckle): its spec text names only an NH36, but the listing sells a "Single Calender" option (blue or green, date at 3) beside the "Double Calender" day-date black dial, and the brand's other date-only SN003 listings name an NH35, so the single-calendar SN003-Q is recorded here with an NH35; that caliber is inferred, not stated. SN003G-CG (316L case with an "antique effect", which the photos show as a distressed black shroud and crown; glass bezel insert matching the red, green, orange or light yellow dial; C3 green lume; "Time Module NH35"; date between 4 and 5; FKM rubber strap with bronze pin buckle or leather strap with steel pin buckle, 22mm tapering to 20mm; about 123g, not stated what was weighed) is $235 in every colour on either strap. The day-date versions are in sn003-nh36, whose SN003-G listing also gives 47mm lug-to-lug, a unidirectional bezel, AR coating and about 145g; none of these is stated on the listings in this file. Every variation showed "Out of stock" on 2026-10-24, so production status is unknown.

Last verified: 2026-10-24. Edit or correct this entry.

Sources