Belden 8871, 8872, 8873 and 8874 are part numbers for the polarized and non-polarized Cheater cords. We used to sell them in the 80's at the distributor I worked for. Dunno which one is which now, some had ears for rivets, others were "true" cheater cords, without the ears.
The long-nose Zenith cheater cord was another series, IIRC. Usually, a call to Zenith was necessary, as Carol cable and Zenith were about the only suppliers for the Zenith cord.
Some (early) Panasonic AC cords in the figure 8 style worked with standard AC interrlocks, but the newer stufff won't.
I recall we had about 15 - 20 cheater cords, and even one "suicide cord" with aligator clips on the end.
All told, we had cords for Sony 4 and 6 pin, BSR turntables, V-M Turntables, Polarized, non-polarized, one Panasonic "D",one Panasonic 8, early and late, an RCA 2-wire IEC, a Hitachi boombox cheater, a Zenith long nose, a dual cheater (for service calls), and a homemade Grundig table radio one, made of some of the greenest, stinkiest epoxy ever.
Edit:
Here's a pix of the 8873:
www.talonix.com/images/pwr/Belden8873.jpg Still dunno about the rest.
Cheers,