[Milsurplus] Bridge Weight Plates?

[KD7JYK DM09]

I may not need the whole manual, what I'm looking for is how the numbers are 
calculated and used.  I've found reference to the E, C and H on top, but 
other info seems to be non-existant.

Kurt

: I have a TM- dealing with vehicle marking... try searching that. The TM- 
is
: in another location, and when I get there in a week or so I can get it and
: scan a few pages for you. My M-211 deuce-and-a-half is from 1952 and uses
: yellow with red markings. Later plates were whatever shade of OD was 
current
: at the time, but I am not sure about the lettering... black? white?