Kleine Omega Kugeluhr in beidseitig verglastem Messing Gehäuse, Zifferblatt mit römischen Zahlen
Formuhr/annexes the Ruhr: exquisite "Boule de Geneve" Kugelformuhr with Granulation and diamonds, No. 18474, possibly Patek Philippe, Geneva, CA. 1860 — catalog High quality wrist watches and pocket watches, fine collector's watch
Horlogerie du XIXe siècle : nouvelles technologies et industrialisation