Baumgartner 866 (QG, 13,5''')

Baumgartner 866 (QG, 13,5''') | - The Movement Archive

Baumgartner 866 (QG, 13,5''')


The BFG Caliber 866 is simple pin lever movement, which at least uses a yoke winding system. It has got only a single-sided shock protection.

The gear construction is pretty unusual, since one reduction step is missing, and the third(!) wheel is directly driven by the mainspring barrel, which is unusually large and has got a diameter of more than half of the main plate. This can only be acieved beause the minute hand is indirectly driven on the dial side.

Another odd construction is that one of the indirectly driven center second: The outer ring of the fourth wheel directly drives the outer ring of the center second wheel.

This movement is also available with a smaller main plate, using the same caliber number.

Baumgartner 866 (QG, 13,5'''): Baumgartner 866 QG 13,5''' dial side

Baumgartner 866 QG 13,5''' dial side

Technical data

Caliber:866 (QG, 13,5)
Caliber base:Baumgartner 866
Size:13,5''' (measured: 30,6mm)
lift angle:44°
Number of jewels:1
Escapement:Pin lever
Balance types: Nickel anular balance
Shock protection(s): Novodiac
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Hairspring key
  • lever
  • escape wheel, seconds wheel, third wheel, mainspring barrel
  • center second pinion
Winding mechanism:yoke winding system
  • SCI (indirect center seconds)
  • QG (date indication (aperture))
References: Flume: -


This movement was kindly donated by Klaus Brunnemer. Thank you very much!