Troll here...I will see if I can find numbers on the coils tomorrow....My Victory Special looks different but it is populated...I will take a picture...

if you get really stuck, the strong museum has parts lists with may have coil part numbers:
https://archives.museumofplay.org/repositories/3/archival_objects/30873

there's also a game 477 called victory derby ... dunno if that's different. I'd get those parts lists too just to see

they will scan and email you pages for a small fee. If you go that route and want to provide copies for the bingo.cdyn.com web site, let me know.

the next one-balls after victory derby/special were jockey club/jockey special and trophy/gold cup

those games have better documentation that you can use to help out if ltroll can't get good/complete part numbers off his game. No guarantee the parts are the same, but there's a good chance they are.

poke around in https://bingo.cdyn.com/machines/bally_one_balls/ for the docs.

the only time I got some parts list copies from the Strong it listed the ohms value of a resistor that was too burnt up to read/measure, so it worked out for me.

There's been at least one coil old-> part number doc from bally, but the one I have doesn't list the CO-27S-13. The doc is at https://bingo.cdyn.com/paper/misc/

below the same info I posted to your question on the EM tech board.

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afaik, the S is the spool designator. 27 is the wire gauge and 13 is the ohms resistance (more or less ... they rounded some of the actual values).

one of the part numbers would have been CO-27S-13

according to some docs the pacific pinball museum has, the S coil spool is same size as the GG coil spool, but the sleeve was inserted the opposite way. The S sleeve was also slightly shorter (1.531 vs 1.562)

the GG coil spool new part number was B (e.g. a CO-25-GG-7 became a B-25-925)

final piece of the puzzle is mapping around 13 ohms to number of turns, and I'd guess (no guarantee) you'd want a B-27-1250 coil. Planetary pinball has NOS for around $7.20 each. The new coils have plastic sleeves instead of brass.

planetary also has the BF-27-1250. What's the difference between a B and BF spool? Dunno. Typically it was stuff like shape/angle/position of the lugs, with/without coil sleeve, which side of the end plate the lug was attached to, etc. I guess you could buy one of each and compare

Did you get all the info to get your Victory Derby going? my special had a major melt down...transformer went out but I have later model Bally bingo with compatible voltages...put all my spares above my office and have to use a ladder to get them...73 years old so I am just going to build a small elevator for safety...Did David Haslam take care of your glass ok?