This is a hard to find M. Viorin Octagonal Pernambuco Violin Bow. According to violin dealer, M. Viorin is a sub-brand produced by Dorfler in Germany. It's specifically a rebranded Dorfler #17.
Crafted with meticulous attention to detail and exceptional balance, the
Voirin violin bow caters to discerning musicians. This bow features premium
horsehair meticulously woven onto a Pernambuco stick, complemented by an
ebony frog adorned with a nickel-silver heal plate,
mother-of-pearl slide, shell eye, three-part adjuster, and nickel-silver
winding wrapped in leather grip.
The bow is in great shape and is slightly vintage. Includes a polished wood carrying case.