Are you asking about the solid brass mandrel, the hollow unplated brass 
mandrel, the plated thick wall brass mandrel, or the thin drawn brass nickel 
plated mandrel?

Regards to all,

Al






-----Original Message-----
From: harvey kravitz <[email protected]>
To: Antique Phonograph List <[email protected]>
Sent: Sat, May 15, 2010 2:29 pm
Subject: [Phono-L] Edison Brass Mandrel


Does anyone know when Edison stopped using brass mandrels for their Homes and 
ther machines? I always wondered about that. Ant information will be greatly 
ppreciated.
hanks,
arvey Kravitz

      
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