The Kasper 900 is rather rare pallet lever movement of the late
1950ies. Its construction was contemporarily modern with a
directly driven center second and a Monorex shock protection.
Since it was equipped with a screw balance and a long regulator arm it
could achieve good precision results, although it was beating with the still modern slow beating
frequency of 18000 A/h.
The clearly arranged construction with its slanted hat-shapred gear bridge is nice to see.
gears and trains
The gears work as following:
Mainspring barrel - center minute wheel - third wheel, center second wheel - escapement wheel.
side view gears and trains
In the side view, you can see the stacked construction, where the center minute wheel is beared
under an own bridge with two jewel bearings. Above that, there's the center second wheel.
The toothing of the escapement wheel is interesting, since it has got two toothings, of which
only the upper one is used for the connection to the center second wheel.
main plate
The jewel bearing of the minute wheel is a bit unusual and technically not really neccessiary,
but it helps easier achieving the popular number of 17 rubis.
dial side view
Also on the dial side, the Kasper 900 makes a very clean appealing. The only noteable thing is
the odd shape of the setting lever spring of the yoke winding system, which reminds
of a bent-to-back arm.
Technical data
Manufacturer
Kasper
Caliber
900
Number of jewels
17
Escapement
Anchor with pallets
Balance
Nickel screw balance
Shock protection(s)
Monorex
Balance cock direction
clockwise
Hairspring stud
fixed
Regulator type
Long regulator arm
Movement construction
Fork Escapement wheel, Fourth wheel, Third wheel Center wheel Mainspring barrel
