I think the 25-20 was a Marlin cartridge originally, and is stamped as the "25-20M" on many Marlin 1894s. Not because they refused to put Winchester's name on the gun, but because it was not invented by Winchester. Additionally, Marlin seemed fine stamping "38-W" and "44-W" on their 1889 rifles, which I've always found interesting.
Always something I think, when I see the misattributed "WCF" suffix that many like to put on the 25-20, 32-40, 38-55, and some of the Sharps cartridges.
And I'd think a 25WCF would refer to the 25-35, but I don't usually see people use that vernacular for that cartridge.