[cctalk] IBM RAMAC platter

[steve shumaker via cctalk]

Greetings!

I recently stumbled across a early hard drive platter that appears, 
based on measurements, to be an original RAMAC platter.  Very little 
comes up in Google beyond basic measures (diameter of 24" and a head 
motion of 6".)   I'm curious if there was anything out there that had 
similar measurements.   I did find a photo on facebook but it clearly 
has different measurements.

Platter is in poor condition (no oxide, nicks and dings, etc although 
still obviously a platter) but the owner is fascinated with possible origin.

Steve