This is a brand new, replacement arm for the Kauffman vibrola used on the early Rickenbacker® 325 and later C58.
 
This arm is sized and bent just like the arm used on the early 325 (think: V81's original tailpiece) and the later 325C58. Two bends, one big knob, and a whole lotta chrome.  If you're one of the lucky mofo's who actually owns an early 325, this is exactly what you need.  If you just lost the arm on your new unit, that's cool too; we can help you out as well.  For a vintage-correct restoration -- or just to get the most out of your right hand -- the right part is only part.