I did some peeking around (on-line) for an item just like yours , bucchb & have not found any .
I have tended towards much older stuff for many years , so I'm no expert on the more current things that folks have here / post here .
If you're feeling skilled & brave enough : cut a very thin small sliver of the suspected pewter off of some unimportant & hidden area of your item , then hold it with a tweezer & hold it over a wood match .... if it melts , prob. pewter .
If you've got a very strong magnet , test for stainless steel ( will show slight/light effect ) .... easy to do with a magnet on a string .
It's not unknown for a part of some metalware to be solid 'precious' metal in some parts & plated in others .
It's not illegal to stamp the 'real' metals with their purity marks / hallmarks ... but it can be deceptive when the genuine metal is an 'added-on' part .
Is it possible that the 'chipped' area you mentioned may have had a tag welded right there (one that somebody removed) ?