I have a Sun Electric Company box of diagnostic cards. The metal box is the original box from the Sun Electric Company, however it has a lot of surface rust.
It contains well over 500 Sun diagnostic cards for almost all makes and models from 1958 - 1966. The cards are 8 1/2" x 11". The metal box is 12 1/2" wide x 15" deep x 9 3/4" tall.
Here is a similar example that was on eBay in better shape with later years:
SunCardsThe individual cards sell for around $5 each on eBay. I am not looking for anything near that, just an honest offer, if you're interested in them.
PPFF preferred (plus shipping).