The seller thinks these are either whale or ostrich leg, but it obviously isn't ostrich leg
and it doesn't look like any calf finish or exotic that I'm familiar with. They told me it was made by Dexter when their factory was in New Brunswick, so whale seems plausible. Personally I'm not comfortable owning something made from whales (although I had a fantasy about buying these and donating them to a museum), but at least someone on here would treat them with respect.
(And no, I hadn't got around to asking for more photos.)