G. Gerlach · Microbrand · Poland
G. Gerlach Poseidon Mechanical Chronograph
From
$745
- Seagull ST1901
- 43 mm
- Sapphire crystal
- 100 m water resistance
Where to buy
Movement
- Caliber
- Seagull ST1901
- Type
- Hand-wound
- Tier
- Mid
- Complications
- Small seconds, Chronograph
- Frequency
- 21,600 bph
- Power reserve
- —
- Hacking
- —
- Accuracy (factory)
- —
Case
- Diameter
- 43 mm
- Lug to lug
- —
- Thickness
- —
- Lug width
- 22 mm
- Material
- —
- Hardening
- —
- Water resistance
- 100 m
- Crown
- —
- Case back
- —
- Bezel
- —
Crystal & dial
- Crystal
- Sapphire
- Shape
- Double-domed
- Anti-reflective
- Yes (side not stated)
- Lume
- —
Bracelet
- Bracelet
- —
Straps
- Strap 1
- Silicone
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| All | — | Msrp | 2,900 PLNincl. VAT | $745 | 2026-10-31 | link |
Variants
| Name | Dial |
|---|---|
| Black | black subdials |
| White | white subdials |
About this entry
47% of key specs known. Missing: lug-to-lug, thickness, weight, case material, hardening, crown, lume, bracelet offered.
The hand-wound chronograph of the Poseidon line; its spec list, shared with the Poseidon Automatic, names "Seiko/TMI NH36 or Seagull ST1901", and the ST1901 is the hand-wound chronograph. 43mm case, double-domed sapphire with AR coating, WR 100, silicone strap, 22mm lugs; two subdial colours. Case material not stated. The brand's store is bilingual and lists the watch twice, as a Polish and an English product at the same price; both pages are listed as stores and prices cite the English one.
Last verified: 2026-10-31. Edit or correct this entry.
Sources
- G. Gerlach, POSEIDON MECHANICAL CHRONOGRAPH (English product page) accessed 2026-10-31
- G. Gerlach, Zegarek Poseidon – mechaniczny chronograf (Polish product page) accessed 2026-10-31
- G. Gerlach store data (description, options and prices in PLN) accessed 2026-10-31