Lets paly what is it!

[Russell in Tulsa]

MassAman, Yes that is a plumbers "Rope" for pouring a horizontal LEAD joint, not solder. And for your info, one that old may be asbestos. They are usually darker in color as we would soak in oil before using them. Just don't handle it too much as you don't want it to get the dust off of it near you or your family.
As to the gear thinga ma jig I have no idea.