San Martin · Factory brand · China

San Martin SN051 39.5mm (NH35)

Ref. SN051-G · Diver

Design reference: Omega Seamaster 300

From $248
  • Seiko NH35A
  • 41 mm × 13.5 mm
  • Sapphire crystal
  • 200 m water resistance

Where to buy

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
41 mm
Lug to lug
48 mm
Thickness
13.5 mm
Lug width
21 mm
Material
Steel (316L)
Hardening
—
Water resistance
200 m
Crown
Screw-down
Case back
Solid, screw-down
Bezel
Unidirectional, 120 clicks, 60-minute, ceramic insert, lumed

Crystal & dial

Crystal
Sapphire
Shape
Domed
Anti-reflective
Yes (side not stated)
Lume
Super-LumiNova C3 (green) with a vintage-tinted "retro" effect, on hands and markers

Bracelet & clasp

Style
Oyster
Links per row
3
Solid end links
—
Solid links
Yes
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)
177 g

Prices

VariantConfigurationTypePriceUSDAs ofSource
All—Street248 USD$2482026-10-24link

Variants

NameReferenceDial
Matte BlackSN051-Gmatte black sandwich
Matte BlueSN051-Gmatte blue sandwich

About this entry

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

The SN051 is sold as two listings in the same case, each with its own movement: the SN051-G with an NH35, recorded here, and the SN051-G2 with a YN55A (see sn051-yn55a). Brand specs (G): NH35, 316L, 39.5mm, 48mm lug-to-lug, 13.5mm (not stated whether including crystal), 21mm bracelet width, "bubble convex" sapphire with AR coating (side not stated), 120-click unidirectional bezel with ceramic top ring and luminous 12 o'clock marker, matte black or matte blue sandwich dial with printed 3D time scale, curved hour and minute hands, "retro luminous effect" C3 green lume on hands and markers, screw-down crown with 3D "S" logo, screw-down caseback with pressed 3D shark logo (marked SUB-0051 and NH35A in the photos), 3-link solid 316L bracelet with folding safety clasp and hexagon logo, 200m, about 177g (not stated what was weighed). The G listing gives only the 39.5mm case; the 41mm bezel diameter recorded is from the G2 listing, which quotes the same 39.5mm, 48mm and 13.5mm case. The 60-minute bezel scale, the Arabic 3-6-9-12 numerals with script logo and the vintage-tinted lume are from photos. Inspired_by follows the listing's "SM300" name and the design (sandwich dial, ceramic-topped bezel, Arabic numerals); the brand does not name the Omega. Both dials come with or without the San Martin logo at the same price ($248). The NH35 is a date caliber, but no SN051 dial in the photos shows a date window, so complications are time only. Every option showed "Out of stock" on 2026-10-25, so production status is unknown.

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

Sources