Tavannes 1 Ref 010 a / Cyma 010 a

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10 1/2”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

There is also a Tavannes 1 Ref 010 / Cyma 010 (without “a”)
The only visible difference to the Ref 010 seems to be the screws on the side of the Ref 010 a for fixing the dial. The Ref 010 has screws on the plate

Listing ID: 2573
Manufacturer / Brand: Tavannes / Cyma
Caliber: Tavannes 1 Ref 010 a / Cyma 010 a
Size: 10 1/2'''
Shape: Round
Winding: Manual (Crown)
Hand Setting: Crown
Seconds Hand: Small seconds
Escapement: Lever (Swiss, English, Glashütte)
Date & Day: None
Jewels: 15
Setting Lever Screw/Pin Position: Right
Balance Position: Bottom (120 - 240°)
Shock Protection: None
Beats per hour: 18,000
Balance Type: Bimetallic screw balance
Power Reserve: Unknown
Production Period: Unknown
Identification: Marked "Ref. 010 a" under the balance. Ref 010 (without "a") is listed in the Classification Horlogère of 1936.
External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-35#post-4343709
Country: Switzerland