[Phono-L] Victor Induction Disc Motors

[DanKj]

 I find that I have 3 variations of the AC Induction Disc motor used in 
Orthophonic Credenzas and other Victrolas:  One is marked "25-40 Cycles per 
second" and is in an 8-30X  I bought from a part of Buffalo which had 25Hz 
power until the late 1930s,  another is "60 Cycles per seond" which came 
from Ebay (I wanted to have a spare, in case the first one croaked) and the 
latest acquisition is "25-60 Cycles per second", in a 1926 Credenza X.

 They all look identical to me,  but there must be some differences, yes? 

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