Pewter has more structural strength than Lead. It is not as soft as Lead. It will weigh less, although it will contain a certain percentage of Lead.
My comment on this item was because of the apparent laminate effect visible in the pics. I don't think Lead would look like that.
Looks more like lead than pewter to me because of the way it's aged. Also, appears to have had a hole in the middle and I think we are only looking at half of it. M nty
I have found alot of them old tubes also lead tops,if its lead you should be able to bend the corner easy,if its pewter it could be part of a colonial candle stick holder from a spanish shipwreck close by