Transmission type "almost" any type considered. Looked at new ones, if I get serious I'll likely buy a brand new and shiny one, but for the explorer, anybody got one looking for a good dry home and appreciative new owner???
(Not really looking for a freebe, pick a price and let me know).
It is used but in very good condition. Pie sections are of known density so they indicate the correct exposure. Saves paper. Also can be used as a large area step tablet. Optical density is easily calculated. Excellent tool for printing. Saves paper and provides better prints.