I'm puzzled by a couple of others things:
1) the seemingly heavy/bigger mountings screws holding the plate between the Bar-o-matic PU's - and no less than 8 of them, WHY?
2) what's under the plate - have you tried to remove it?
3) the "B-plate" on the tailpiece seems to be up side down - can it be turned around
At first I didn't notice the bridge (on the floor in the first pic), thought it was missing at well. Now that I've noticed it it seems a bit large or bulky for the usual Burns alloy bridge (could be the pic though)...
4) is it the original bridge?
MORE pictures, please
Re serial # - AFAIK Burns guitar have no serial # or ID except the one usualy on the neck plate.
Erik