17 1/2”’ | Hand Wind | Swiss Lever | Small Seconds |

• Listing ID: 20620
• Manufacturer / Brand: ARSA / Unitas
• Caliber: 221
• Size in French Lignes: 17 1/2'''
• 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
• Jewels: 15
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: Unknown
• Country: Switzerland
• Identification: Movement marked with ARSA on the center wheel bridge and with 221 next to the balance wheel.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)