Oled, thanks so much for that.
So, here's the clock as I received it... obviously the top is wrong, but the coving around the top portion actually corresponds to some of your pictures. One piece of it was short and it was all sloppily PVA-glued on, which is why I suspected it was as unoriginal as the top. But judging from your pictures, it's likely I should restore the coving as well.
I rather missed the mark on the bottom finial, but I spent so much effort on it, I'm going to leave that.
As to which one... I took a look at the columns on the sides of the doors and the bottom part as well as the shape of the door opening (frame around the glass). These are the candidates:
(Note the coving at top matches my picture above.)
Interesting that only the first one has the R|A pendulum; and so many of the others have unmarked pendula as the second one here does. The numbers on mine are arabic; the picture roman. And the door opening bottom is curved on mine; the picture is flat.
Alas, I hate the top in the picture and it would be nearly impossible to reproduce.
It does support a possible reason for its demise: if it were dropped on its head, it would never have survived. The glass was replaced, too (glazed in with brad nails instead of glazing points as the sides are). And one back corner of the coving support (the part to which the coving is attached) was replaced with a piece that's too short. So these clues all offer a lot of tantalizing theories.
But I think the first picture (Nr 5 in the catalog) is the winner, despite the minor differences.
I'm going to cogitate on whether to attempt a reproduction of the top or just go with one of the others that's easier and more agreeable.