San Martin · Factory brand · China

San Martin SN031 38mm

Ref. SN031-G · Diver

San Martin SN031-G 38mm with black California dial on black nylon strap
Photo: San Martin
  • San Martin SN031-G with retro grey California dial on grey nylon strap
  • San Martin SN031-G with retro yellow California dial on khaki nylon strap
  • San Martin SN031-G case profile with domed crystal and screw-down crown
  • San Martin SN031-G screw-down caseback
From $168
  • Epson YN55A
  • 38 mm × 14 mm
  • Sapphire crystal
  • 200 m water resistance

Movement

Type
Automatic
Tier
Entry
Complications
Hours, Minutes, Seconds
Frequency
21,600 bph
Power reserve
40 h
Hacking
Yes
Accuracy (factory)
—

Case

Diameter
38 mm
Lug to lug
47.5 mm
Thickness
14 mm
Lug width
20 mm
Material
Steel (316L)
Hardening
—
Water resistance
200 m
Crown
Screw-down
Case back
Solid, screw-down
Bezel
—

Crystal & dial

Crystal
Sapphire
Shape
—
Anti-reflective
—
Lume
Retro C3 (green glow) on hands and markers

Bracelet

Bracelet
Not offered

Straps

Strap 1
Nylon, One-piece nylon strap, 20mm straight, stainless steel pin buckle

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
All—Street168 USD$1682026-10-24link

Variants

NameReferenceDial
Black dialSN031-Gblack
Retro grey dialSN031-Ggrey
Retro yellow dialSN031-Gretro yellow

About this entry

80% of key specs known. Missing: weight, hardening, AR coating.

The SN031-G is the only SN031 listing. Brand specs: YN55 (recorded as the Epson YN55A, as on the other San Martin YN55 models), 316L, 38mm without crown, 47.5mm lug-to-lug, 14mm including crystal, 20mm lugs, sapphire crystal (no AR coating mentioned, so AR is left blank), black, retro yellow or retro grey dial, luminous hands, "retro" lume glowing C3 green, 7.5mm screw-down crown, screw-down caseback, one-piece 20mm straight nylon strap with stainless steel pin buckle, 200m. No bracelet is offered. The brand calls it a "retro military diving watch"; the photos show a cushion-shaped case with a smooth bezel, a California-style dial (Roman numerals at the top, Arabic at the bottom) and a high domed crystal. All three dials are $168. Photos show no date window, so complications are time only. 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