Need a part for this caliber? Supporters unlock the parts catalog, factory equivalents, and the donor finder that shows which other movements can supply the part you need. Become a Supporter

Updates to data and images are welcome from our readers.

Seagull ST19 (ST1901)

Update

Basic Information

Name	Seagull ST19 (ST1901)
Manufacturer	Sea-Gull
Launch Year	1963
Caliber Family	Description ST1901: bas calibre ST19 ST1902: 12h-hand at 6h, just current time ST1903: 24h-hand at 6h, just current time ST1905: power-reserve display at 4:30h ST1906: power-reserve display at 6h ST1907: central power-reserve display ST1908: date at 12h, moon phase at 6h ST1940: automatic Related calibers Seagull ST19 (ST1901)
Is COSC certified	Yes

Timegrapher

Beat rate

21,600 bph

Frequency

3 Hz

Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.

Technical Details

Lignes Dimensions	13.75 ‴
Dimensions	31.3 mm
Height	5.85 mm
Further Measures	Mounting Diameter (Dm): 31.0mm Dial Plate: 0.4mm Fig.: 3 Stem height (T): 1.8mm
Power Reserve	51 hours
Frequency	21,600 vph
Jewels	19

Complications and Specifications

Shape	Round
Complications	Sub Second Chronograph Second Chronograph Minute
Regulator Type	Pinned Regulator (or Index Regulator)
Movement Type	Manual
Escapement Type	Swiss Lever
Control Type	Balance Wheel
Winding Type	Stem Winding (Crown)
Setting Type	Stem Set (Crown Pull)

Additional Information

Hand Sizes	1.40 x 0.95 x 0.28 / 0.29 x 0.25mm
Hand Count	4
Country Of Manufacture	China
Notes	Remarks: 1963- The calibre is to wide extent a copy of the Venus 175, but it is only a rumor that it is produced with the according tools. There are many variants with additional more or less useful features, which are not yet listed here, unless according samples become available.
Signature	ca. 2010: - ; Seagull

Compatible Parts

No parts linked yet for this caliber.

Metadata

Created At	Sep 15, 2023
Updated At	Jan 28, 2024, 9:01:45 PM