Zenith 19''' Bas. V.S.I. lép. / négative Ref. 19-28-1 T

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

Remarks:

Lép. = Lépine = open face movement
Negative winding mechanism
As Ref. 19-28-2 T also available as Savonnette (hunter) movement
And with an older negative winding mechanism: references 19-28-1 (Lépine) and 19-28-2 (Savonnette)
Cam disk regulator

Listing ID: 13253
Manufacturer / Brand: Zenith
Caliber: 19''' Bas. V.S.I. lép. / négative Ref. 19-28-1 T
Size in French Lignes: 18 1/2''' (42.0 mm) (19''' according to manufacturer)
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: 16
Setting Lever Screw/Pin Position: None (Negative Winding)
Balance Position: Right (0 - 120°)
Shock Protection: None
Beats per hour: 18,000
Balance Type: Bimetallic screw balance with Breguet hairspring
Power Reserve: Unknown
Production Period: Unknown
Country: Switzerland
Identification: Listed in the Classification Horlgère from 1936 and in the Zenith book from Manfred Rössler. Design already registered in the Swiss Official Gazette of Commerce in 1904.