The cords are sold as-is, as-found, and untested. They were no doubt kept on hand for replacement cords for the vintage radio and TV cabinets that accommodated this style of plug. I unwound one and found the cord to still be soft and flexible, and measured the cord at 6 feet. The cord relaxed as it was unwound, and should ease further if left in a warm environment. (see photo)
I find the UL approval symbol, B & M, and 7A 125V in raised letters on the screw-on plug. I measured the pin centers at about 5/16" apart, and the screw centers about 1" apart.
I'm also selling a cord "stub" that I found in this cord collection. Perhaps you can use it to splice to a cord that you already have. In fact, check my other listings, as I also have 6' white power replacement cords on which you could splice this plug.
I hope this is the cord that you have been looking for!!
Thanks for looking here!!
(misc 8)