5 3/4”’ x 8 3/4”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• The Flume K1 catalog lists three variants (I, II, III) of the caliber 52, which differ in their setting lever springs
• The regular Felsa 52 has straight edges, this movement has round edges

• Listing ID: 18592
• Manufacturer / Brand: Felsa
• Caliber: 52 II 'round'
• Size in French Lignes: 5 3/4''' x 8 3/4''' (5 1/4''' according to manufacturer)
• Size range mm largest diameter: 0 - 22 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Holes in setting lever spring or rocking bar: 2
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1928
• Country: Switzerland
• Identification: Felsa 52 variant I listed in the Ebauches SA catalog from 1928. With round edges not listed in any movement identifier known to me.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)