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

Remarks:

• The movement is also available in height H 5.3 mm
• Optionally with swan-neck fine regulator
• Different bridge shapes known
• Minor differences between ARSA and Unitas, e.g. different winding stem

• Listing ID: 3566
• Manufacturer / Brand: ARSA / Unitas / Stowa
• Caliber: ARSA 18 1/2''' Sav. H 4,7 mm = Unitas 362 = Stowa 186
• 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: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, possibly from around 1930
• Identification: In the Flume K1 catalog in the 1947 part as A. Reymond (ARSA) 18 1/2''' Sav. H 4.7 mm and listed as Unitas 362. One of the movements marked Stowa 186.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-23#post-3360732
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)