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Durowe 443

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Durowe 443 caliber

Basic Information

Name	Durowe 443
Manufacturer	Durowe
Launch Year	1956
Caliber Family	Description 10.5" : 440: manual wind 443: manual wind, small date 445: manual wind, modified bridge shapes 10.5" , balance like successor family 450ff: 441: manual wind 446: manual wind, modified bridge shapes 11.5" : 540, 542: manual wind 570: automatic 580: automatic, small date 585: manual wind, normal date 590: automatic, normal date suffix -1: ring balance, no regulator pointer Related calibers Durowe 440, Durowe 441, Durowe 443, Durowe 445, Durowe 446, Durowe 540, Durowe 542, Durowe 570, Durowe 570/1, Durowe 580, Durowe 585, Durowe 590, Durowe 590/1
Is COSC certified	No

Technical Details

Lignes Dimensions	10.5 ‴
Dimensions	23.7 mm
Height	4.05 mm
Further Measures	Mounting Diameter (Dm): 23.3mm Stem height (T): 2.3mm Mounting Height (F): 1.0mm
Power Reserve	36 hours
Frequency	18,000 vph
Jewels	21

Complications and Specifications

Shape	Round
Complications	Sweep Second Date
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	1.30 x 0.80 x 0.22mm
Hand Count	3
Country Of Manufacture	(not set)
Notes	Remarks: 1956- Other data: balance staff: U2243 stem: W2404 / W2875 thread 1.1mm/0.9mm mainspring / battery: Zf682, 1.20 x 9.5 x 0.105 x 300mm balance staff ronda: 4120 (10,5) stem ronda: 1116 (10,5) Mainspring: 1.200 x 9.000 x 0.105 x 300.000 mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 21
Signature	ca. 1960: Laco, 21 Jewels - 7; Duro-Swing (Durowe 440)

Metadata

Created At	Sep 15, 2023
Updated At	Apr 23, 2025, 11:31:46 PM