1950s Negative envelope

1950s no frills film negative envelope. Had a handfull of the square Verichrome negatives still in it.

 

Going thru Dads old pics & negatives (remember negatives?) I realized the little envelopes we got the pics & negs back were kind of cool. He never threw anything out!

 

If anyone knows more specific information or corrections, please let me know!

Thank you

Done