carb throttle plate numbers

[Toolman]

can anyone tell what the numbers on the throttle plates represent ?

TIA

 

[dannymax]

can anyone tell what the numbers on the throttle plates represent ?

TIA

I believe they tie into bore size....34mm, 35mm, etc. but not sure which is which altho the 35mm's always seem to have the same number....(don't remember what it is tho)