I have two questions for the TT experts (Larry, Bill, Don etc.)

1. Which were the colours of the front and side race numbers and plates for the 1937 Lightweigh TT? I see that the front plate had dark numbers on clear background - the opposite for the side plate. But which were the exact colours?

2. I see in some shots from the 30s that the Lightweight front plate has clear numbers/dark backgrounds. Are they shots from the TT practices?

Thanks in advance!
Marco.