Many of them are marked super & solid Nickel, Made in England, London, Kangaroo, Never Rust, & a few I have not been able to discern. The mouth pieces & types vary. Some are quite unique!
WELCOME to the Forum!!
So, we can start with some of what you see... Super & solid Nickel...
are some of the materials bits were made from years ago...compounds.
I find these bits have minimal shine, are heavier in weight holding them in my hand and actually my horses liked them better if not best of any bit I own or tried with them. Never-Rust..
again is a compound of metals used to manufacture the bit. Made in England...
pretty self-explanatory. Bits can be from many manufacturers located all over the world. At one time, the best quality came from England. London...
not one I am as familiar with. Thinking still a manufacturer but the question is from which locale of London is it since England, Ontario and one other location all manufactured horse equipment at one time. Kangaroo...
is a bit manufacturer.
All of what you listed are just manufacturers and some of the compounds used in the bit being manufactured.
Assumption is those words are stamped into the metal mouthpiece of the bit or is some sort of stick-on label.
Do take some pictures of the bits, many people can place 5 or 6 bits on a solid backed cloth/towel and snap a picture...then post it here and the members will help you identify what you have acquired.
Some bits today are worth $$$, some are not...
Quality is quality, cheap knock-offs are just that.
If you are thinking of using them make sure none have jagged edges, burrs or heavy rust on the mouthpiece or rings as that is cause for harming the mouth or weakness in the metal that can break harming you and absolutely the animal if breakage occurs while in use.
From western riding you know about sweet-iron mouths, well they existed in English bits too so don't just toss because of what it appears, look closely first.
So, pictures to help us help you identify or lay them out and do the internet thing...
Snaffle, broken mouth with single or double joint
Snaffle, solid bar or ported
Shank, broken single or jointed
Shank, bar with port, without port
Leverage, ported, slotted, no slots, broken mouth single or double joints
Leverage, elevator or gag again with various mouthpieces
Pelham, single or double joint, bar, ported
Specialty, can be anything that not fit into any of those easy descriptive breakdowns.
There is some beginning homework and how you can display, search yourself with some wording so hopefully it is easier matching bit to picture or use our learned members minds to help identify.
So, every part of a bit can be slightly different so exacting sizes and dimensions for proper identification is needed.
Pay close attention, it all matters and makes a difference.
Happy journey of discovery to you..