Can Anyone Decode This Ford 2100 Carb?

I tried searching for information on how to decode this engineering number, but couldn't find anything to help me. The center letter is a bit hard to make out, even in person.

Here is a photo:

 

These following numbers are for AUTOLITE/MOTORCRAFT
2100 Series Carburetors. This number can be found
on the left side of the float bowl, right behind
the accelerator pump rod, inside of a circle. The
number(s) on the left corresponds with the CFM rating
(s) on the right. The first numbers are the Venturi
Size, the second is the corresponding CFM.
These numbers are for 2V carburetors only (2100/2150).
Number = CFM
.98 = 190
1.01 = 240
1.02 = 245
1.08 = 287
1.14 = 300
1.21 = 351
1.23 = 356
1.33 = 424