I'm sorry my post and photo raised more questions rather than answering them.
Ben's salt is not in a photograph in the Wallace Homestead book (I also have the 1978 edition). I was mistaken in saying so. But it seems to match the description in the auction catalog you mentioned, of the air-trap salts. My husband & I purchased that lot, of 2 pairs. I'm not sure we even saw the catalog listing, as we did not attend, and had someone else bid for us. As described, one pair is like Ben's, 3 shell or "claw" appendages on the side, with 3 turquoise blue beads on each one, no foot. Since there is no photo in the book, Manley did not describe it so it could not have been changed for the catalog.
The other pair was also clear glass, no bubbles, but with 2 sets of 3 beads, also set on applied shells or claws. They also have single beads equidistant to the grouping of 3 beads. It is footed. This salt is what is pictured as # 287. This is how the confusion has set in. The book pic may not have been clear enough to see that it has no bubbles. If you restore my photo, you can see which one resembles Ben's, and which one is #287. I have no idea about the maker's attribution. But both the salts I pictured are my actual ones (with less than stellar photography) and not reproduced from either the book or the catalog.
Sorry to be so long-winded, but as I am new, I want to be clear, and to keep to your guidelines. I hope to continue on this message board, and I have learned that mistakes will not slide by!