there is an e-book by Angela Bowey and Raymond Berger which discusses Lampl and his work - this won't necessarily verify that yours are or aren't, but might help - alternatively, it might be possible to contact Raymond Berger, though no idea as to his whereabouts. We don't seem to get this stuff on the Board on anything like a regular basis.
My own initial opinion is that the joins between stem and animals are perhaps slightly unimaginative - lack of knops and finesse - but that is just a thought based on one picture in Hajdamach and a complete lack of knowledge of Bimini.
Might be an idea if you're able to add the height of these pieces. Sorry this is unhelpful.