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Gruen 502

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Gruen 502 caliber

Gruen 502 caliber

Basic Information

Name	Gruen 502
Manufacturer	Gruen
Launch Year	1936
Caliber Family	Description 500: 17 jewels 500DD: 17 jewels, hand gear for Duo-Dial models 501: 15 jewels 502: 7 jewels Assignments according to Gruen Material Catalog 539, but not to reality. Probably all variants were at least partially signed with 500. Related calibers Gruen 500, Gruen 501, Gruen 502
Is COSC certified	No

Technical Details

Lignes Dimensions	7.75 ‴ x 11.75 ‴
Dimensions	17.48 mm x 26.51 mm
Height	3.95 mm
Further Measures	Mounting Diameter (Dm): 17.65 x 26.4mm
Power Reserve	40 hours
Frequency	18,000 vph
Jewels	7

Complications and Specifications

Shape	Rectangle
Complications	Sub Second
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	1.22 x 0.66 / 0.16mm
Hand Count	3
Country Of Manufacture	Switzerland
Notes	Remarks: 1936- Breguet hairspring to wide extent like 355, but due to three available hand post heights applicable in more pedestrian flat and curved models Conoruma is Gruen's proprietary alloy for hairspring and balance with low temperature dependence Other data: balance staff: U2415 stem: W2162 mainspring / battery: 1.18 x 8.5 x 0.105 x 250mm ~Zf665, 1.20 x 8.5 x 0.095 x 265mm balance staff ronda: 1141 (7,75 x 11) stem ronda: 364 (7,75 x 11) Mainspring: 1.100 x 8.500 x 0.105 x 240.000 mm
Signature	1937: 328811, 500, Gruen Watch Co, Switzerland, Coronuma Hrsp. & Bal., 15 Jewels (Gruen 501 signed as 500)
Import Codes	FXF — Fairfax Watch Co., Gruen GXC — Gruen Watch Co.

Metadata

Created At	Sep 15, 2023
Updated At	Feb 9, 2024, 6:10:22 PM