The first two look obviously (badly) restocked. One may have a previously stepped barrel which has been turned off??

Not an expert.

We had a member here (no longer) and still is a member of a some forums who was once flogging off an "original square bridge" which another member purchased and promptly returned for a refund. I believe this happened several times with the sale of the same "original" square bridge Mauser. The square bridges were 'after market' creations or so I was told.

I wonder about the square bridges of at least one of those rifles shown???

At least the photos show how bad the fitting of metal to wood is.

If trust is missing on one or two items, let the buyer beware on the others IMO.