Are Columbia A and AT top castings the same?

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BretB
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Are Columbia A and AT top castings the same?

Post by BretB »

I'm curious as to whether these are the same part or if they will interchange. I have a first type cylinder machine with a pot metal top casting and am wondering if the type A top casting is the same part? If so, it'll widen my options as to a cast iron replacement.

Thanks for any information,
Bret

BretB
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Re: Are Columbia A and AT top castings the same?

Post by BretB »

Sorry for any confusion, I have a first type AT cylinder graphophone with a pot metal top casting. Just to clarify.

Bret

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phonogfp
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Re: Are Columbia A and AT top castings the same?

Post by phonogfp »

Yes, the A and AT upper castings are interchangeable.

To clarify, all A and early AT castings are cast iron. Around 1900-1901, American Graphophone apparently experimented with the pot metal upper casting, but by 1902 they reverted to cast iron. Thank goodness...

George P.

BretB
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Re: Are Columbia A and AT top castings the same?

Post by BretB »

Thank you for the information. I was hoping this might be the case.
Bret

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phonogfp
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Re: Are Columbia A and AT top castings the same?

Post by phonogfp »

You're welcome - - glad to help.

George P.

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