This web page has the following list:
LOF Glass Plant Code
3= Sherman,TX
4= East Toledo,OH (tempered)
5=Ottawa,IL
6=Rossford,OH
7=Ottawa,IL
8=East Toledo,OH (laminated)
10=Lathrop,CA
16=Breckenridge,PA
C=Collingwood,ONT Canada
https://nastyz28.com/threads/70-owne...ss-info.27181/