I'm really not trying to be picky or argumentative, but................
just wondered if in fact this one would qualify as a genuine lazy susan - I had some notion that the lazy susan had to revolve on a central pedestal or stand, rather than the whole thing needing to be physically turned round as this appears it might. Correct me if I'm wrong - often am.
Had some notion that pieces like this with segmented trays were common in the 1950s - 60s - and probably made by a variety of makers so likely that a positive id unlikely, although I'd agreee Davidson always a possibility.
Apologies unable to offer anything of real help.