I don't know much about typeset, fonts, or 'serfs'. I thought a serf was a poor English farmer.
I have 3 different Mason ID's for the same initials. One is for the Coconut Grove in MS. One has the words "Mono CG" typed on the card. The other 2 has "Mono CG New Style" typed on them.
The only way to ID which chip went where is by colors. Only one had a chocolate chip.
Yellow, green, and white would be a toss up as to where they went.