Posted By:
Jeff W.It is very obvious, on the E91 strip, that it has been cut/trimmed on both the top and bottom. However, it is not very obvious that it has been cut on the sides. Therefore, I believe that your observation is correct that these were printed 12 cards wide. Let me double check the auction that I bought this from because they had other strips that we could look at to verify your theory.
Edited to add: That the theory has been shot down. I bought this strip in a mile high card company auction that also had several other E91 strips available. The size of the strips range from 12 cards wide to 16 cards wide. Below is the link to the auction, the E91 strips are lots #33-40.
http://www.milehighcardco.com/Catalog.aspx
Jeff