I work at the Computer History Museum in Mountain view, CA



In our punch card section, we have 3 IBM 026 Keypunches.



When you lift the cover of the print portion of the keypunch;


This is the size of the actual ribbons;


We also have an IBM 029 keypunch that uses the same ribbon;



Box of NOS keypunch Ribbons;


3/16 = .1875



The box you sent me shows;


The ribbons you sent me are 12.7 mm wide.


The box of ribbons you sent me are for some IBM printer but not for the IBM Keypunches.


I will be expecting a full refund soon.


Stan Paddock