I've also dug out the mostly built bracket signal. Plan A (yet another one) was to disassemble the signal and re-make it with the bracket on the left, but to be honest I really don't think that would go well, so much has to be re-done. A new kit is too much dosh to justify. So, it's going to be wrong, but I'm blaming a re-signalling at some point in the early 60s where it was decreed stuff should be reused if at all possible, so the signal is 'wrong' because signals.