Extremely rare Russian birch wooden pocket watch Circa 1865

Bronnikov pocket watch made of birch wood and bones
–
An extremely rare, large Russian birch wooden and bones pocket watch, circa 1865. Case, movement and dial made of birch wood and bones. Still in its original signed wooden box including remains of the original chain.
–
Diameter: 50 mm
–
Signed: Mikhail Semyonovitch Bronnikov Russia
–
Not in working order and not complete.
–
Bronnikov watches are absolute rarities. Only a few of them are completely preserved. The few known examples are in such important collections as the Kremlin, the Hermitage and the Mathematisch-Physikalischer Salon in the Dresden Zwinger.