12”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Click underneath the barrel bridge

• Listing ID: 5270
• Manufacturer / Brand: Eterna
• Caliber: 520
• Size in French Lignes: 12'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 16
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1936
• Identification: Barrel bridge marked with ETERNA. Listed in the Classification Horlogère from 1936.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-62#post-8800893
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)