Unit Record stuff 
Wiring board for an IBM 513 card reproducing machine. From 1942. It is older than me!
Wiring board for an IBM 513 card reproducing machine. From 1942. It is older than me!

Wiring board for a 403 Alphabetic Accounting Machine. Similar to 
http://www.columbia.edu/
acis/history/407.html
Wiring board for a 403 Alphabetic Accounting Machine. Similar to
http://www.columbia.edu/
acis/history/407.html

1942 manual for the 513 punch.
1942 manual for the 513 punch.

Sheet used to layout the wiring for the 513 punch.  First coding sheet??
Sheet used to layout the wiring for the 513 punch. First coding sheet??

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