San Martin · Factory brand · China
San Martin SN0138 37mm (ST2130)
- Seagull ST2130
- 37 mm × 12.4 mm
- Sapphire crystal
- 200 m water resistance
Where to buy
- San MartinWorldwide
- San MartinWorldwide
Movement
- Caliber
- Seagull ST2130
- Type
- Automatic
- Tier
- Mid
- Complications
- Hours, Minutes, Seconds
- Frequency
- 28,800 bph
- Power reserve
- —
- Hacking
- Yes
- Accuracy (factory)
- —
Case
- Diameter
- 37 mm
- Lug to lug
- 45.5 mm
- Thickness
- 12.4 mm
- Lug width
- 20 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 200 m
- Crown
- Screw-down
- Case back
- —
- Bezel
- Unidirectional, 120 clicks, 60-minute dive, aluminum insert
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- BGW-X1 blue (silver-logo B and B2) or C3 green (golden-logo B), 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
- —
- Micro-adjust
- On-the-fly, "Fly Adjustable Clasp"
- Diver extension
- —
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
- Stated weight (basis not given)
- 147.3 g
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| B Black, Silver Logo | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B Black, Golden Logo | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B Blue, Silver Logo | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B Red, Silver Logo | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B Green, Golden Logo | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B Purple, Golden Logo | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B Gradient Brown, Golden Logo | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B2 Gradient Black | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B2 Gradient Blue | — | Street | 328 USD | $328 | 2026-10-24 | link |
| B2 Gradient Red | — | Street | 328 USD | $328 | 2026-10-24 | link |
Variants
| Name | Reference | Dial |
|---|---|---|
| B Black, Silver Logo | SN0138-B | black |
| B Black, Golden Logo | SN0138-B | black |
| B Blue, Silver Logo | SN0138-B | blue |
| B Red, Silver Logo | SN0138-B | red |
| B Green, Golden Logo | SN0138-B | green |
| B Purple, Golden Logo | SN0138-B | purple |
| B Gradient Brown, Golden Logo | SN0138-B | gradient brown |
| B2 Gradient Black | SN0138-B2 | gradient black |
| B2 Gradient Blue | SN0138-B2 | gradient blue |
| B2 Gradient Red | SN0138-B2 | gradient red |
About this entry
84% of key specs known. Missing: hardening, end links, link attachment.
The Seagull ST2130 versions of the 37mm SN0138, merging the SN0138-B and SN0138-B2 listings, which quote the same case; see sn0138-nh35 for the earlier NH35 version with a ceramic bezel. Brand specs: 316L, 37mm, 45.5mm lug-to-lug, 12.4mm including crystal, 20mm lugs, sapphire with AR coating (side not stated), 120-click unidirectional bezel with aluminium insert (60-minute scale from photos), snowflake hands, screw-down crown, screw-down caseback, 200m, solid 316L three-link bracelet with the "Fly adjustable Clasp" (on-the-fly; positions and range not stated), about 147.3g (not stated what was weighed). Bracelet taper not stated. Lume is BGW-X1 blue on the B versions with a silver logo and on the B2, C3 green on the B versions with a golden logo. The ST2130 has a date but no dial shows a date window, so complications are time only. inspired_by is read from the design (snowflake hands, Black Bay-style dial and numbered dive bezel) and the brand's "BB Diver" titles; the brand does not name the watch. Price $328 on both listings on 2026-10-24; both were in stock on 2026-10-25.
Last verified: 2026-10-25. Edit or correct this entry.
Sources
- San Martin official store, SN0138-B 37mm ST2130 BB diver, new dial colors accessed 2026-10-25
- San Martin official store, SN0138-B2 37mm ST2130 BB diver, gradient dials accessed 2026-10-25