8 3/4”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Part of a movement family of nine movements with different bridge shapes: 361, 362, 364, 365, 500, 501, 505, 508, 545
• The ETA 361 is already depicted in an ETA advertisement from 1925; the ETA 500 may have already existed around this time

• Listing ID: 19212
• Manufacturer / Brand: ETA
• Caliber: 501
• Size in French Lignes: 8 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: 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, probably around 1925 (see remark above)
• Country: Switzerland
• Identification: ETA marked in oval on dial side. Listed in the Ebauches SA catalog from 1935 and in the Classification Horlogère of 1936.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)