AS 913

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11 1/4 x 12 1/2”’ | Hammer-Automatic | Swiss Lever | Small Seconds |

Remarks:

Automatic: winding in one direction only, manual winding not possible
According to Hampel, the first automatic movement from AS. You can see that the movement shares a lot with the AS 1049 (e.g. balance staff and winding stem). The fact that it is really older than the AS 1049 could be determined by the cock for the oscillating weight. This is fastened with only one screw, whereas the AS 1049 has two screws that go through an additional hole in the cock.
Patent: 1932-12-20: CH164895: registered by A.Schild SA

Listing ID: 1729
Manufacturer / Brand: AS
Caliber: 913
Size: 11 1/4 x 12 1/2''', Height 5.2 mm
Shape: Form
Winding: Automatic
Hand Setting: Crown
Seconds Hand: Small seconds
Escapement: Lever (Swiss, English, Glashütte)
Date & Day: None
Jewels: 15
Setting Lever Screw/Pin Position: Left
Balance Position: Bottom (120 - 240°)
Shock Protection: None
Beats per hour: 18,000
Balance Type: Bimetallic screw balance
Power Reserve: Unknown
Production Period: Probably 1935 - 1940
Identification: Listed in the Paulson 1950 and Swartchild 1956 catalogs.
External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-42#post-5523441
Country: Switzerland