Durowe F

Manual · 8.75‴ x 11.5‴ · Germany · 1935

Dimensions
19.74 mm x 25.94 mm
Height
3.90mm
Jewels
16
Power reserve
Timegrapher
Beat rate
18,000bph
Frequency
2.5Hz

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

Movement
Movement type Manual
Winding type Stem Winding (Crown)
Setting type Stem Set (Crown Pull)
Escapement type Swiss Lever
Control type Balance Wheel
Regulator type Pinned Regulator (or Index Regulator)
Specifications
Lignes 8.75‴ x 11.5‴
Shape Barrel (Tonneau)
Complications Sub Second
Hand count 3
Hand sizes 1.20 x 0.70 / 0.20mm
Further measures
Mounting Diameter (Dm): 19.4 x 25.75mm
Origin & References
Manufacturer Durowe
Country Germany
Launch year 1935
COSC certified No
Signature
ca. 1940: Laco 580 - D (Durowe) (Laco 580)
Notes
Remarks: 1935-
other designation: Durowe 10.5" F
Other data: balance staff: U732 stem: W732 mainspring / battery: Zf873, 1.30 x 10.0 x 0.11 x 320mm balance staff ronda: 4157 (10,5) Mainspring: 1.300 x 9.500 x 0.110 x 320.000 mm
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 15, 16