You can rest assured that none of those are for 50 ohms or even close, but you can still fool around with them on a VNA and get some ideas of what they are.
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Those color codes can identify them somewhat since the functions of the ones used in transistor radios were somewhat standardized long ago and assigned to color codes, but different manufacturers may have their own or modified codes. But, it's a good place to start. A good info source is the fun with tubes group here:
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https://funwithtubes.groups.io/g/main/messages
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I know I have seen and been involved in some pertinent IF transformer discussions there, and have seen references to some sites with info on the color codes and such, within the past couple years or so. It's not a high traffic group, so it should be fairly easy to search for the right stuff there. It's easy to join if necessary to ask for advice and look through their archives.
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I have similar but much larger troubles with IF cans of all sorts, with small numbers of very many kinds that I have pulled and saved over decades - lots of brands, sizes, styles, color codes, and so on. I started sorting them somewhat a couple years ago, but have a very long way to go, and most will never be properly ID'd. I have maybe a thousand pieces. The ones you have probably were high volume broadcast radio units with standard functions in the signal chains, seven different ones may have been all that were needed for a wide range of AM/FM transistor sets.?
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The easiest to spot are the IFTs, which often have a tiny dogbone ceramic capacitor mounted in a cavity on the bottom. These tune for the nominal IF 455 kHz AM or 10.7 MHz FM and possibly 19/38 kHz pilots for stereo decoding. Sometimes AM LO and FM discriminator transformers have the built in cap too, which can confuse things a bit. I think FM LOs usually used open coils that are deformed for tuning so not in cans. The cans without the caps are more general purpose. It's possible to have TV parts too, including video IF around 43 MHz VSB, and audio IF and traps around 4.5 MHz. My collection is mostly in these types but includes lots of others like VCRs, cordless and cell phones, ISM bands, CB radios, satellite, cable, and industrial stuff. I also have a lot of just plain variable inductors, which are very handy, and of course, using only one winding of an appropriate transformer can serve the purpose. Note also that many types can be opened up and modified.?
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Another big clue is the style of the magnetic tuning slug. If it's fat (and will be ferrite) and goes around the outside of the coil assembly like an inverted cup, it's likely for very low frequencies below 10 MHz. That yellow one in your? picture might be that kind. Try to screw it all the way down and see if the coil form is visible under the can lip. If not, it's a low frequency one. Midband types will have more of a screw-shaped slug of ferrite (lower end) or powdered iron (upper end) that threads into the coil form. If the slug is aluminum, that's for VHF like satellite 480 or 600 MHz IF and helical filters.
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Anyway, the nature of the part will tend to show on a VNA even without matching - it's a sloppy measurement, but probably enough to ID the basic function types. The best thing to start with is a 50 ohm series damping R in each line to/from the VNA which will reduce any crazy resonances so things are a little easier to decipher. No fancy fittings are needed - just tack in whatever parts help get a cleaner picture. It's actually a helluva lot of fun to experiment with and re-task various IF can type parts into new uses. I have done it a lot especially for custom LC filters, where adjustable tuning is essential. I like to use fixed padded mica caps with variable slug-tuned chokes in cans for most filters below a hundred MHz.
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Ed
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