Atlas is probably the best quide available for primarily US recoginized brands - some European models. It is not perfect. It uses serial numbers primarily to determine year of manufactuer. Some times a company liek Nissan uses a manufacturing model number and a marketing name for commercial (literature, price lsit, advertising, etc. purposes.

There is another guide out there (the name ??? (CRS set in) that I have used and it provided some additional and maybe more accurate information than the Atlas guide.

Used both when I was evalauting and selling used forklifts for a company that started up & then disappeared faster than a rag doll but made a nice $ while it lasted. Ain't forlfits fun! One reason "I don't do them any more."