Waltham American Grade Watches
Starting in 1859, the top grade of Waltham production was the
"American Grade" including models 1859 18 size, KW20 (1860 Nashua
model), KW16, 1868, 1872, 1888, and 1899 16 size, the 1894 12 size and the OM
Model 00 size American Grade. The only exceptions to this characterizations are
the 1888 model Riverside Maximus and the 1908 model Premier Maximus which many
people argue are superior to the American Grade in the same model. The Premier
Maximus is closely related to the 1899 American Grade "Bridge Model."