So basically, after all that, what you have is a pair of candelabra bases with an arm each and each missing three more?
If the arms were silver they would have been hall-marked. If Phil is right, and he usually is, continental or .800 silver, and if English .925 silver. But you didn’t show us any silver marks on the two arms remaining so we are presuming they too are EPNS or plate.
If you happened to have a bag or two of plaster of Paris, some bronze ingots, a small blast furnace, a metal file and a plater you could make some new arms.
It would be a complete waste of time from an economic point of view but it would take your mind off your annoying relatives for a week or so.
Failing that, or in the alternative finding some new arms, you have a purely decorative object – which is a polite way of saying completely useless.
When I lived in your country for a month or so they used to have things called jumble sales. I thought it was something to do with elephants – although how they got enough elephants on the vicarage lawn to generate any interest I was a little unclear about.
Anyway, I discovered I was nearly right they didn’t actually sell elephants they sold white elephants – white elephants being things that have little or no intrinsic merit and utterly lack utilitarian value but which, if you happen to be deeply religious you will buy, if only to put back in the same sale the following year. You also get fruit cake. Although how that worked I never asked.
I guess this is recycling in the world of religion. Anyway, that may well be the highest and best use of your impedimenta. And, who knows, your brother may show up and be tempted to buy them for the good of his soul.
Okay, probably not.
CRWW