These EPROMs are DIP 24 ceramic chips with a quartz window. They appear to be very clean NOS. All the chips I received went through a program/erase cycle of 1s and 0s, so I'm pretty sure they're error free. The leads still have the angle needed for automatic pick and place machines. If they had been slotted or soldered in the past, the pins would be almost parallel to the body. So I'm very happy with what I got for the price paid. The seller will send electrostatic safe, so don't worry.
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