San Martin · Factory brand · China

San Martin SN0128 40mm

Ref. SN0128-G · In production · Diver

Design reference: Tudor Black Bay

San Martin SN0128-G divers with matte black dials, snowflake hands and green, wine red and black ceramic bezels on five-link bracelets
Photo: San Martin
  • San Martin SN0128-B divers with black-brown and black-gray gradient grid dials and black ceramic bezels
  • San Martin SN0128-4 diver with pink dial and black ceramic bezel
  • San Martin SN0128-4 diver with light blue dial and brown ceramic bezel
From $258 to $306
  • Seiko NH35A
  • 40 mm × 11.95 mm
  • Sapphire crystal
  • 200 m water resistance

Movement

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
40 mm
Lug to lug
49.5 mm
Thickness
11.95 mm
Lug width
20 mm
Material
Steel (316L)
Hardening
—
Water resistance
200 m
Crown
Screw-down
Case back
—
Bezel
Unidirectional, 60-minute dive, ceramic insert
Finishing
Brushed caseback

Crystal & dial

Crystal
Sapphire
Shape
—
Anti-reflective
Yes (side not stated)
Lume
BGW9 blue (SN0128-G), C3 green (SN0128-B) or BGW-X1 blue (SN0128-4), on hands and markers

Bracelet & clasp

Style
Jubilee
Links per row
5
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)
143 g

Prices

VariantConfigurationTypePriceUSDAs ofSource
G Wine Red Bezel—Street306 USD$3062026-10-24link
G Green Bezel—Street306 USD$3062026-10-24link
G Black Bezel—Street306 USD$3062026-10-24link
B Black-Brown Gradient—Street258 USD$2582026-10-24link
B Black-Gray Gradient—Street258 USD$2582026-10-24link
4 Pink—Street288 USD$2882026-10-24link
4 Light Blue—Street288 USD$2882026-10-25link

Variants

NameReferenceDialBezel
G Wine Red BezelSN0128-Gmatte blackwine red ceramic
G Green BezelSN0128-Gmatte blackgreen ceramic
G Black BezelSN0128-Gmatte blackblack ceramic
B Black-Brown GradientSN0128-Bblack to brown gradient, grid textureblack ceramic
B Black-Gray GradientSN0128-Bblack to gray gradient, grid textureblack ceramic
4 PinkSN0128-4pinkblack ceramic
4 Light BlueSN0128-4light bluebrown ceramic

About this entry

84% of key specs known. Missing: hardening, end links, link attachment.

Merges the four SN0128 listings (SN0128-G, SN0128-B, SN0128-4 and the SN0128-4 light blue listing), which quote the same case. Brand specs: 316L, 40mm, 49.5mm lug-to-lug, 11.95mm (not stated whether that includes the crystal), 20mm lugs, sapphire with AR coating (side not stated), ceramic bezel (unidirectional on the G and B listings; clicks not stated; the 60-minute scale is from photos), applied hexagon logo (printed on the G), snowflake hands, screw-down crown with 3D hexagon logo, brushed screw-down caseback, 200m, solid 316L five-link jubilee bracelet, 20mm tapering to 16mm, with the "New Fly Adjustable Clasp" (on-the-fly; positions and range not stated), about 143g (not stated what was weighed). Lume is BGW-9 blue on the G, C3 green on the B and BGW-X1 blue on the SN0128-4. The NH35 has a date but no dial shows a date window, so complications are time only. inspired_by is read from the design (snowflake hands, Black Bay-style dial and bezels) and the brand's "BB Diver" titles; the brand does not name the watch. The SN0128-G listing says its black-bezel version now uses a new, thinner case (red and green unchanged) and shows a side-by-side photo, but gives no new figures; all listings quote 11.95mm. The SN0128-B photos are filed as "SN0128-3". The SN0128-4 pink listing also names a leather strap option that has no purchasable variation, so only the bracelet is recorded. Prices on 2026-10-24/25: G $306, B $258, SN0128-4 $288 (pink on both SN0128-4 listings). The SN0128-4 pink listing was in stock on 2026-10-25; the G, B and light blue listings showed "Out of stock".

Last verified: 2026-10-25. Edit or correct this entry.

Sources