San Martin · Factory brand · China

San Martin SN0005 40mm (NH34)

Ref. SN005-B2 · In production · GMT, Diver

Design reference: Rolex GMT-Master

San Martin SN005-B2 GMT with enamel white dial, red and blue bezel, jubilee-style bracelet
Photo: San Martin
  • San Martin SN005-B2 GMT with matte black dial
  • San Martin SN005-B1 GMT with matte black dial
  • San Martin SN005-B1 GMT with enamel white dial
  • San Martin SN005-B3 GMT with aged black dial
  • San Martin SN005-B3 GMT with aged white dial
From $308 to $388
  • Seiko NH34A
  • 40 mm × 13 mm
  • Sapphire crystal
  • 200 m water resistance

Movement

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

Case

Diameter
40 mm
Lug to lug
48.7 mm
Thickness
13 mm
Lug width
20 mm
Material
Steel (316L)
Hardening
—
Water resistance
200 m
Crown
Screw-down
Case back
Solid, screw-down
Bezel
Bidirectional, 24 clicks, 24-hour GMT, sapphire insert, lumed

Crystal & dial

Crystal
Sapphire
Shape
Domed
Anti-reflective
Yes (side not stated)
Lume
C3 green (B1, B3) or BGW-X1 blue (B2)

Bracelet & clasp

Style
Jubilee
Links per row
5
Solid end links
—
Solid links
—
Link attachment
—
Taper
—
Quick release
—
Half links
—
Clasp
Fold-over
Micro-adjust
—
Diver extension
—

Weight

Head only
—
On bracelet
—
On strap
—
Stated weight (basis not given)
143 g

Prices

VariantConfigurationTypePriceUSDAs ofSource
B1 matte black dial, C3 lume—Street308 USD$3082026-10-24link
B1 enamel white dial, C3 lume—Street308 USD$3082026-10-24link
B2 matte black dial, BGW-X1 lume—Street388 USD$3882026-10-24link
B2 enamel white dial, BGW-X1 lume—Street388 USD$3882026-10-24link
B3 aged black dial, C3 lume—Street308 USD$3082026-10-24link
B3 aged white dial, C3 lume—Street308 USD$3082026-10-24link

Variants

NameReferenceDialBezel
B1 matte black dial, C3 lumeSN005-B1blackred and blue sapphire
B1 enamel white dial, C3 lumeSN005-B1whitered and blue sapphire
B2 matte black dial, BGW-X1 lumeSN005-B2blackred and blue sapphire
B2 enamel white dial, BGW-X1 lumeSN005-B2whitered and blue sapphire
B3 aged black dial, C3 lumeSN005-B3blackred and blue sapphire
B3 aged white dial, C3 lumeSN005-B3whitered and blue sapphire

About this entry

79% of key specs known. Missing: hardening, end links, link attachment, clasp micro-adjust.

The 40mm SN0005 GMT with a Seiko NH34 (the brand writes both SN005 and SN0005). Three listings with identical case specs: SN005-B1 ($308, printed markers, C3 green lume), SN005-B2 ($388, applied markers, BGW-X1 blue lume) and SN005-B3 ($308, "aging effect" dials, printed markers, C3), each in matte black or enamel white. Brand specs: 316L, 40mm, 48.7mm lug-to-lug, 13mm thick (not stated whether including crystal), 20mm lugs, domed ("bubble") sapphire with AR coating (side not stated), bidirectional 24-click bezel with red and blue sapphire insert and full lume (the B3 listing omits direction and clicks), four-hand GMT, screw-down crown with 3D hexagon logo, screw-down solid caseback, 316L 5-link bracelet (jubilee style in the photos) with the "new" extension folding clasp with safety (what the extension does is not described, so micro-adjust is left blank), 200m, about 143g (not stated what was weighed). The SN005-B2 white dial was in stock on 2026-10-24; every other variation showed "Out of stock". The Hangzhou 6460 versions of this case (48.5mm lug-to-lug, plain folding clasp) are in sn0005-hangzhou-6460. Inspired_by is read from the design (red and blue 24-hour bezel, jubilee bracelet); the brand does not name it.

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

Sources