Hahn Model No. 4

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19 1/2”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

Balance visible on the dial side -> used in pocket watches of the Honestus brand
Movement also available with a height of 4.20 mm
In model no. 4, the winding stem and the visible balance are in line. On November 24, 1902, Hahn registered the corresponding Model No. 2 in the Swiss Official Gazette of Commerce, in which the winding stem and balance are at a 90-degree angle
Model no. 4 looks like a Lépine (open face) movement because of the balance wheel. However, it is actually a Savonnette (hunter) version, as the winding stem and second wheel form a 90 degree angle. However, the movement has no seconds hand. Accordingly, model no. is the Lépine version

Listing ID: 12196
Manufacturer / Brand: Hahn
Caliber: Model No. 4
Size in French Lignes: 19 1/2''', height 5.36 mm
Size range mm largest diameter: > 40 mm
Shape: Round
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: Center
Balance Position: Bottom (120 - 240°)
Shock Protection: None
Beats per hour: 18,000
Balance Type: Monometallic screw balance
Power Reserve: Unknown
Production Period: Unknown, probably around 1901
Country: Switzerland
Identification: Movement marked with Swiss patent number 16598 and with German patent number 140330. Registered by Charles Hahn on 29.11.1901 in the Swiss Official Gazette of Commerce as model no. 4. Model No. 4 is not an official caliber designation, but was used to register the design.