San Martin · Factory brand · China
San Martin SN0105 38.5mm (Seagull ST1901)
- Seagull ST1901
- 38.5 mm × 13.3 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
- 38.5 mm
- Lug to lug
- 47.5 mm
- Thickness
- 13.3 mm
- Lug width
- 20 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 100 m
- Crown
- Push/pull
- Case back
- Solid, screw-down
- Bezel
- Fixed
- Finishing
- Brushed caseback
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- SLN C3 (green) and BGW-9 (blue) on hands and markers
Bracelet & clasp
- Style
- Beads of rice
- Links per row
- —
- Solid end links
- —
- Solid links
- Yes
- Link attachment
- —
- Taper
- 20 → 18 mm
- Quick release
- —
- Half links
- —
- Clasp
- Fold-over
- Micro-adjust
- —
- Diver extension
- —
Straps
- Strap 1
- Nylon, 260mm long, 316L buckle with San Martin logo
Weight
- Head only
- —
- On bracelet
- 139 g
- On strap
- 77.8 g
Prices
Variants
| Name | Reference | Dial |
|---|---|---|
| Matte Black | SN0105-G-JS | black |
About this entry
74% of key specs known. Missing: hardening, bracelet links, end links, link attachment, clasp micro-adjust.
The chronograph SN0105, a flieger-style dial with a triangle at 12. Brand specs: Seagull ST1901 manual-wind chronograph, 316L, 38.5mm, 47.5mm lug-to-lug, 13.3mm (not stated whether that includes the crystal), 20mm lugs, sapphire with AR coating (side not stated), matte black dial, luminous hands, SLN C3 green plus BGW-9 blue lume on hands and markers, push-pull crown with 3D hexagon logo, brushed screw-down caseback, 100m. Sold on a beads-of-rice bracelet, 20mm tapering to 18mm, 190mm long, with a folding clasp with safety ($345), or on a 260mm nylon strap with a 316L buckle ($305); the brand gives "about 77.8g/139g", read as on the strap and on the bracelet. Links per row and micro-adjust are not stated. The solid caseback and fixed bezel are from photos. Both options showed "Out of stock" on 2026-10-25, so production status is unknown.
Last verified: 2026-10-25. Edit or correct this entry.