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

Remarks:

• For detailed information about the different types of Crettiez movement see Crettiez – Watch movements and social riots (watch-movements.eu) and the attached categorization chart.
• Like type 4a, but crown winding without pusher and with cover plate for hand setting wheels

• Listing ID: 546
• Manufacturer / Brand: Crettiez
• Caliber: 18 1/2''' Type 4b
• Size in French Lignes: 18 1/2'''
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1920 - 1940
• Country: France
• Identification: See link mentioned above
• 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-54#post-7243123
• External Link 2: https://watch-movements.eu/blog/en/2022/05/01/crettiez-watch-movements-and-social-riots/