Gruen 405

Update

Basic Information

NameGruen 405
ManufacturerGruen
Launch Year1938
Caliber FamilyDescription
respectively 17/15 jewels
405/406: 10.5 x 11.5" , sub second
405SS/406SS: 10.5 x 11.5" , sweep second
410/411: 10.5" , sub second
410SS/411SS: 10.5" , sweep second
420/421: 11.5" , sub second
420SS/421SS: 11.5" , sweep second
425/426: 10.5 x 10.5" , sub second
425SS/426SS: 10.5 x 10.5" , sweep second
suffix C: curved dial side

Related calibers
Gruen 405, Gruen 405SS, Gruen 406, Gruen 406SS, Gruen 410, Gruen 410C, Gruen 410SS, Gruen 411, Gruen 411C, Gruen 411SS, Gruen 420, Gruen 420SS, Gruen 421, Gruen 421SS, Gruen 425, Gruen 425SS, Gruen 426, Gruen 426SS
Is COSC certifiedNo

Technical Details

Lignes Dimensions10.5 ‴ x 11.5 ‴
Dimensions23.69 mm x 25.94 mm
Height4.1 mm
Further MeasuresMounting Diameter (Dm): 23.45 x 25.45mm
Stem height (T): 2.5mm
Power Reserve43 hours
Frequency18,000 vph
Jewels17

Complications and Specifications

ShapeCushion
Complications
  • Sub Second
Regulator TypePinned Regulator (or Index Regulator)
Movement TypeManual
Escapement TypeSwiss Lever
Control TypeBalance Wheel
Winding TypeStem Winding (Crown)
Setting TypeStem Set (Crown Pull)

Additional Information

Hand Sizes1.22 x 0.66 / 0.16mm
Hand Count3
Country Of ManufactureSwitzerland
NotesRemarks: 1938-
Breguet hairspring
stem mechanism without setting-lever spring
Other data: balance staff: U1736 stem: W2075 mainspring / battery: 1.15 x 9.0 x 0.11 x 250mm ~Zf582, 1.15 x 9.0 x 0.10 x 290mm balance staff ronda: 1165 (10,5-11,5) stem ronda: 165 (10,5) Mainspring: 1.100 x 8.500 x 0.110 x 260.000 mm
Signatureca. 1945: 852488, GXC, Gruen Watch Co, Switzerland, Veri-Thin, Conoruma, 15 Jewels, Unadjusted (Gruen 406)
Import Codes

Metadata

Created AtSep 15, 2023
Updated AtFeb 9, 2024, 6:10:20 PM