13 3/4”’ | Hand Wind | Swiss Lever | Small Seconds | Chronograph |

Remarks:

• Chronograph cam-actuated: central chronograph seconds, 30 min counter at 3 H
• Button at 2H: Start, Button at 4H: Stop/Zero setting
• Movement also available with 45 min counter
• Base movement: Landeron 48
• Same movement with date: Landeron 187

• Listing ID: 5904
• Manufacturer / Brand: Landeron
• Caliber: 248
• Size in French Lignes: 13 3/4''', height 6.22 mm
• Size range mm largest diameter: 31 - 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Other Functions: Chronograph
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: None, Incabloc
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Approx. 41 hours
• Production Period: Unknown
• Country: Switzerland
• Identification: Marked with Landeron logo and 248 under balance wheel. Listed in the "Official Catalogue of genuine Swiss Watch repair parts" from 1949.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-67#post-9539020