I think its hard to define a #1. How do you factor in cabs with no serial numbers? Are they post proto? Pre-production?
I have proto #1 t-mek UR. They only made 2 of them.
my airborne has to be close to #1. Mine is production quality and they made maybe 10 of them. I never noticed a serial number on it.
I had all 5 proto UR airborne's (4 of them now). proto #1 was destroyed as it was just a test piece. It was more of a work bench. Boards outside of the cabinet.
I have proto klax #2. Its now a multi jamma game for me(I saved the guts)
I have proto #2 hydra. Its production quality, but it has no seral numbers.
I have proto #4 relief pitcher. Its production quality, but it has no seral numbers.
hard drivn UR. Its production quality, but it has no serial numbers.
missile command UR. Its production quality, but it has no serial numbers. Only tag is time warner tag (#4?)
I had mystic marathon #3, but I sold it.
I traded scott a proto missile command cabaret(very different than production).
I have a few other proto cabs(not complete games), not sure what numbers they are (world rally, rampart, maximum force, war, freeze)