San Martin · Factory brand · China

San Martin SN020 39mm (PT5000)

Ref. SN020-G4 · Explorer

Design reference: Rolex Explorer

San Martin SN020-G4 39mm explorer with sunray blue dial, applied markers and Mercedes hands on steel bracelet
Photo: San Martin
  • San Martin SN020-G4 39mm explorer with black dial
  • San Martin SN020-G4 39mm explorer with light blue dial
From $326
  • PT5000
  • 39 mm × 12.5 mm
  • Sapphire crystal
  • 100 m water resistance

Movement

Caliber
PT5000
Type
Automatic
Tier
Mid
Complications
Hours, Minutes, Seconds
Frequency
28,800 bph
Power reserve
38 h
Hacking
Yes
Accuracy (factory)
-12 / +12 s/day

Case

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

Crystal & dial

Crystal
Sapphire
Shape
—
Anti-reflective
Yes (side not stated)
Lume
BGW-9 blue on hands and markers

Bracelet & clasp

Style
Oyster
Links per row
3
Solid end links
—
Solid links
—
Link attachment
—
Taper
20 → 16 mm
Quick release
—
Half links
—
Clasp
Fold-over
Micro-adjust
Tool (pin holes), 4 positions
Diver extension
—

Weight

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

Prices

VariantConfigurationTypePriceUSDAs ofSource
Black dial—Street326 USD$3262026-10-24link
Sunray blue dial—Street326 USD$3262026-10-24link
Light blue dial—Street326 USD$3262026-10-24link

Variants

NameReferenceDial
Black dialSN020-G4black
Sunray blue dialSN020-G4blue sunburst
Light blue dialSN020-G4light blue

About this entry

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

The SN020-G4 listing sells the 39mm SN020 with a PT5000 ($326) or a Sellita SW200 ($456) in black, sunray blue or light blue, with the San Martin logo only (custom logos not offered); this file is the PT5000 version, and the SW200 builds of the G4 and G3 listings are merged in sn020-sw200. Brand specs: 316L, 39mm, 47.5mm lug-to-lug, 12.5mm (not stated whether that includes the crystal), 20mm lugs, sapphire with AR coating (side not stated; crystal shape not stated, unlike the G2 and G3 "top hat"), polished steel bezel (recorded as fixed with no insert), applied hour markers, "classic Mercedes" hands, BGW-9 blue lume on hands and markers, screw-down crown with 3D hexagon logo, brushed screw-down caseback, 316L bracelet with female end links, 20mm tapering to 16mm, folding clasp with safety and 4 micro-adjust holes (recorded as tool micro-adjust), 100m, about 136g (not stated what was weighed). Inspired_by is read from the design (3-6-9 dial, Mercedes hands, smooth bezel) and the listing titles, which call it an "explorer"; the brand does not name the Rolex. The movement has a date but the 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