This collection consists of two subgroups.

The Missoula Orchards Company Subgroup includes business correspondence (1920-1934) with company president William L. Nuessle, and with various fruit dealers, lumber companies, and others concerning the packing, shipping, and marketing of Macintosh apples. In addition the subgroup contains invoices (1920-1934), payrolls (1926-1927, 1930-1934) and other financial records; legal documents; a subject file (1933-1934) concerning the Agricultural Adjustment Administration's wheat and corn programs; and miscellany.

The William Frederick Seltz Subgroup (1939-1949) includes personal correspondence, financial records, and other materials concerning his operation of the farm after the dissolution of the company, and concerning his move in to Missoula after retirement.