Aristocrat Models
New Aristocrat Models: s/n ca. 2627xx to 267xxx; 1932 to 1934
Aristocrat (Series I): s/n 267xxx to 291xxx; 1934 to 1941
Aristocrat "Big B" Models: s/n 291xxx to 355xxx; 1941 to 1955
Aristocrat (Series II -- model 140 alto, etc.): s/n 331xxx to 357xxx; 1951 to 1959
Aristocrat (Series III -- model 141 alto, etc.): s/n 357xxx to 381xxx; 1959 to 1963
Selmer Models: s/n 381xxx and later; 1964 and later