Up for sale here is this vintage Western Electric KS-8688 selenium rectifier, dated 1943 and Made in USA. This was removed from a piece of WWII-era Western Electric tube gear and has some of that yellowish anti-fungal coating or whatever it is on it. The terminals have some solder and wire bits on them but should clean up easily. This has a bit of wear, mostly near the screw holes, but is in great shape and is guaranteed to work great for you. Please see my pictures for details.
US shipping and handling is $5, and international is $18. If you have any questions, please ask.
I have more rectifiers and other vintage electronics listed--feel free to take a look!