San Martin · Factory brand · China
San Martin SN0103 39.5mm
- Seagull ST1901
- 39.5 mm × 13 mm
- Sapphire crystal
- 100 m water resistance
Where to buy
- San MartinWorldwide
Movement
- Caliber
- Seagull ST1901
- Type
- Hand-wound
- Tier
- Mid
- Complications
- Small seconds, Chronograph
- Frequency
- 21,600 bph
- Power reserve
- —
- Hacking
- —
- Accuracy (factory)
- —
Case
- Diameter
- 39.5 mm
- Lug to lug
- 48 mm
- Thickness
- 13 mm
- Lug width
- 20 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 100 m
- Crown
- Push/pull
- Case back
- Solid, screw-down
- Bezel
- Fixed, tachymeter, steel insert
- Finishing
- Brushed caseback
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- BGW-9 (blue) on hands and markers
Bracelet & clasp
- Style
- —
- 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)
- 146 g
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| All | — | Street | 349 USD | $349 | 2026-10-24 | link |
Variants
| Name | Reference | Dial |
|---|---|---|
| Matte Black | SN0103-G-JS | black |
| Black Panda | SN0103-G-JS | black with white subdials |
| White Panda | SN0103-G-JS | cream with black subdials |
| Matte Red | SN0103-G-JS | red |
| Sunray Green | SN0103-G-JS | green |
About this entry
79% of key specs known. Missing: hardening, end links, link attachment, clasp micro-adjust.
The brand's title calls it the "40mm SM57 Chronograph"; the spec list gives a 38.5mm case with a 39.5mm bezel, and the larger figure is recorded. inspired_by is read from the "SM57" name and the design (broad-arrow hands, engraved steel tachymeter bezel, panda and black dials), not stated by the brand. Brand specs: Seagull ST1901 manual-wind chronograph (small seconds at 9, 30-minute counter at 3), 316L, 48mm lug-to-lug, 13mm (not stated whether that includes the crystal), 20mm lugs, sapphire with AR coating (side not stated), steel chronograph bezel, broad-arrow hands, BGW-9 blue lume on hands and markers, push-pull crown with hexagon logo, brushed screw-down caseback, solid 316L bracelet with a folding clasp with safety, 100m, about 146g (not stated what was weighed). The bezel's tachymeter scale, the solid caseback and the three-link bracelet are from photos; no micro-adjust is mentioned. Each dial is sold with or without logo at $349. The store also lists a "Sunray Blue" dial (shown in the group photo) but offers no option for it. Every variation showed "Out of stock" on 2026-10-25, so production status is unknown.
Last verified: 2026-10-25. Edit or correct this entry.
Sources
- San Martin official store, SN0103-G-JS "SM57" chronograph with Seagull ST1901 accessed 2026-10-25