Cyma 797

Update

Basic Information

NameCyma 797
ManufacturerCyma
Launch Year1935
Caliber FamilyDescription
hunter / open face (old designation) respectively

H= 3.85mm:
704,706 / 705,707 (17" 30): 3 train cocks
784,786 / 785,787 (17" 18): 1 train cock
796 / 797: bigger barrel

H= 5.05mm:
764,766 / 765,767 (17" 6): 3 train cocks
768 / 769: 3 train cocks, negative stem mechanism
734,774 / 735,775 (17" 7): 2 train cocks
736,776 / 737,777 (17" 7): 1 train cock
778 / 779: 1 train cock, negative stem mechanism

Related calibers
Cyma 17" 18 hunter, Cyma 17" 18 open-face, Cyma 17" 30 hunter, Cyma 17" 30 open-face, Cyma 17" 6 hunter, Cyma 17" 6 open-face, Cyma 17" 7 hunter, Cyma 17" 7 open-face, Cyma 704, Cyma 705, Cyma 706, Cyma 707, Cyma 734, Cyma 735, Cyma 736, Cyma 737, Cyma 764, Cyma 765, Cyma 766, Cyma 767, Cyma 768, Cyma 769, Cyma 774, Cyma 775, Cyma 776, Cyma 777, Cyma 778, Cyma 779, Cyma 784, Cyma 785, Cyma 786, Cyma 787, Cyma 796, Cyma 797
Is COSC certifiedNo

Technical Details

Lignes Dimensions17 ‴
Dimensions38.35 mm
Height3.85 mm
Further MeasuresMounting Diameter (Dm): 37.8mm
Power Reserve34 hours
Frequency18,000 vph
Jewels15

Complications and Specifications

ShapeRound
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 Sizes1.75 x 1.10 / 0.22mm
Hand Count3
Country Of ManufactureSwitzerland
NotesRemarks: open face calibre
Breguet hairspring
Other data: balance staff: U1702 stem: W1448 mainspring / battery: Zf2937, 1.40 x 15.5 x 0.18 x 480mm balance staff ronda: 2312 (17) Mainspring: 1.450 x 15.500 x 0.185 x 500.000 mm
Signatureca. 1935: 356032, Cyma**, Ref. 775, Patented, Swiss Made, 15 Jewels (Cyma 775, H= 5.05mm)

Metadata

Created AtSep 15, 2023
Updated AtFeb 9, 2024, 6:07:46 PM