18 1/2”’ | Hand Wind | Swiss Lever | Small Seconds | Alarm |

Remarks:

• Alarm with hammer striking on gong
• Alarm time is set by turning the bezel of the pocket watch
• The dial of the pocket watch bears the Swiss patent number 42203

• Listing ID: 17682
• Manufacturer / Brand: Eterna
• Caliber: 52 / Model No. 1
• Size in French Lignes: 18 1/2''' (18''' according to manufacturer)
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown with pin/pusher
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Other Functions: Alarm
• Jewels: 11
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1908+
• Country: Switzerland
• Identification: Listed in the Jacob catalog from 1949. Registered by Eterna in the Swiss Official Gazette of Commerce on 20.06.1908 as model No. 1. Model No. 1 is not an official caliber designation, but was used to register the design.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)