0 Size (13”’) | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Savonnette (hunter) movement
• Swan-neck fine regulator
• Screwed-in settings (Chatons)
• Negative winding
• Jewels: Sapphires (white) for the balance, rubies (red) for the rest

• Listing ID: 4571
• Manufacturer / Brand: Rockford
• Caliber: Grade 190 Winona
• Size in French Lignes: 0 Size (approx. 13''')
• 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: 15
• Setting Lever Screw/Pin Position: None (Negative Winding)
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: Probably around 1910, based on the serial number
• Identification: Marked with Rockford Watch Co. and Winona. Information based on serial number: https://pocketwatchdatabase.com/search/result/rockford/816511
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-9#post-2071394
• External Link 2: https://pocketwatchdatabase.com/search/result/rockford/816511
• Country: U. S. A.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)