San Martin · Factory brand · China
San Martin SN009 40mm (YN55A)
- Epson YN55A
- 40 mm × 13.1 mm
- Sapphire crystal
- 300 m water resistance
Where to buy
- San MartinWorldwide
Movement
- Caliber
- Epson YN55A
- Type
- Automatic
- Tier
- Entry
- Complications
- Date
- Frequency
- 21,600 bph
- Power reserve
- 40 h
- Hacking
- Yes
- Accuracy (factory)
- —
Case
- Diameter
- 40 mm
- Lug to lug
- 46.5 mm
- Thickness
- 13.1 mm
- Lug width
- 20 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 300 m
- Crown
- Screw-down
- Case back
- —
- Bezel
- 120 clicks, ceramic insert, lumed
Crystal & dial
- Crystal
- Sapphire
- Shape
- —
- Anti-reflective
- Yes (side not stated)
- Lume
- BGW-X1 (blue glow) on hands and markers
Bracelet & clasp
- Style
- Oyster
- Links per row
- 3
- Solid end links
- —
- Solid links
- —
- 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)
- 171.6 g
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| All | — | Street | 278 USD | $278 | 2026-10-24 | link |
Variants
| Name | Reference | Dial | Bezel |
|---|---|---|---|
| Matte black dial | SN009-G-D | black | black ceramic |
| Dark blue dial | SN009-G-D | blue | black ceramic |
About this entry
84% of key specs known. Missing: hardening, end links, link attachment.
The 40mm SN009 (the 44mm SN009 is in sn009-nh35, sn009-pt5000 and sn009-sw200). The listing names the movement "YN55", recorded as the Epson YN55A as on the brand's other YN55 models. Brand specs: 316L, 40mm, 46.5mm lug-to-lug, 13.1mm (not stated whether that includes the crystal), 20mm lugs, sapphire with "Swiss AR Coating" (side not stated), 120-click ceramic bezel with lume pip at 12 (direction not stated), matte black or dark blue dial, "GS Crafts" hands, "BGW-X1 Blue Light" lume on hands and markers, screw-down crown with hexagon logo, screw-down caseback with 3D shark logo, 20mm 3-link bracelet about 200mm long with "Fly Adjustable Clasp" (recorded as on-the-fly micro-adjust, as on the published SN0004; positions and range not stated), 300m, about 171.6g (not stated what was weighed). Both dials are $278 and were in stock on 2026-10-24. Photos show a date at 3.
Last verified: 2026-10-24. Edit or correct this entry.
Sources
- San Martin official store, New SN009-G-D 40mm YN55 accessed 2026-10-24