It is marked "Sterling Weighted," and hallmarked "Poole." It is
made in three sections, so that various combinations of base,
middle, and top can fit together. The problem is: the male threaded
fitting on the top section is too small to fit tightly into the
female 'socket' on the other two sections.
David, I think you’re gonna bite off more than you realize if you
try to get fancy with these. many such items are made of literally
paper thin silver, and then filled with plaster, or worse, shellac,
which weighs them down and reinforces the thin metal to keep it
rigid. That then means you can’st solder on these without making a
major mess.
If the fittings originally fit properly, and are now just worn, I’d
guess your tolerance is too small to make a decent sleeve with any
certainty. I’d suggest the inelegant, but probably effective,
solution of cleaning both mating threaded parts quite well, and
permenantly epoxying them together. I’m assuming the orignal
interchangeability of parts was intended for the manufacturers
convenience, not the versatility of the piece by the user. If this
is correct, then a fixed joint should solve the problem. If not,
well, then you’ll need to get fancier. But I’d suggest you be very
careful. some pieces of this sort can be real traps for the unwary
smith…
Peter