Minutentourbillon mit Karussellgang "Mobilis"

A rare gent's pocket watch with carousel power
minute tourbillon
according to the Swiss patent
no. 30754 of Paul Loichot
"Mobilis"
date of manufacture approx. 1910
with club-tooth lever escapement

The tourbillon movement, invented by the Swiss watchmaker Paul Loichot, which he turned in the case to make it visible on face-side (Swiss patent no. 30754), was patented for the Courvoisier brothers on July 4th in 1905 at the number 19062 and the trade name 'Mobilis'.

Tourbillons are constructions, wherein the balance, including spring and escapement, are attached in a movable, open case, which cancels the vertical location errors in as it rotates around itself. The balance is fixed in the center of the carousel. The seconds movement is under the balance of this central axis, which is installed seperatly of the second wheel and is moved by the "Kleinbodenrad" to be able to turn the carousel. The second wheel is fixed on the movement plate at the carousel-center axis., which moves the escape wheel by undwind the escape movement. Breguet invented the Tourbillon about 1800 and patented it in 1801. Depending on type it can have different round trip times. In the construction described here the carousel rotates one time per minute. The Tourbillon is known to be one of the most difficult and complicated constructions in watchmaking history. This construction makes the most sense in portable watches. But some times it was installed in ship's chronometers or table clocks.
Details on the watch:
Dial
silvered
sunk, excentric small dial with Arabic numerals and outer five-minute divisions
Breguet hands
aperture for visible tourbillon cage with engraved balance bridge
very good condition with slightly age traces of use

Movement
full plate movement
frosted
gilt
Brevettatto R.A. 206.N.232
Bté S. G. D. 30754
Pat.N. 7888/1905
U.S. Pat. appl. for D. R. P. ang.
polished screws
screw compensation balance
blued hairspring
fine florally engraved Tourbillon bridge
ruby endstone on balance
The movement was professional overhauled, it is fully functional and is in a very good working condition.

Case
silver case, fineness 0.800
on the back side engine-turned with black enamelled enamel decoration
diameter approx. 54mm without pendant
total weight of the watch: approx. 115 grams
very good condition with age traces of use
The watch is fully functional and is in a very good total condition.