Mylar Tektronix photos from 1950’s and 60’s fro eBay

John Williams
 

I purchased these Tektronix photos on Mylar from eBay. I would appreciate it if someone out there could shed any light on purpose, origin, etc. The listing has good photos so I won’t try to post any more. Thanks. John


https://www.ebay.com/itm/Lot-Of-18-1950-s-60-s-Tektronix-Electrical-Device-Schematics/153702060973?hash=item23c95b53ad:g:Tr4AAOSwjG5dknsw

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