New Old Stock / Vintage Bigsby B-5 Left-Handed 
TRUE VIBRATO TAILPIECE
WITH ORIGINAL MOUNTING AND STRINGING INSTRUCTIONS
This was made in Kalamazoo Mich. USA while Paul Bigsby still owned the company.

The B5, sometimes referred to as the Bigsby “horseshoe”  Vibrato is designed for flat top solid body guitars.
The B5 attaches via four screws to a guitar’s top, the B5 is extremely versatile. B5s are common on many styles of guitars such as SGs, Les Paul Jrs, Telecasters, some Rickenbackers, etc.
This is an old GOLD Left-handed version. At least 35 new-old-stock years old
... was in storage from a now defunct music store.