Original vintage food industry trade magazine ad for WASHBURN WILSON SEED COMPANY of Moscow, ID.  Equipment Checked to Avoid Mixtures.  All Washburn's seed peas and beans undergo many inspections to avoid mixtures, and one of the most important of these is the checking of equipment.Every drill as well as threshing machine is checked by Washburn's own field men before any crop is planted or threshed. Old 1946 seed peas and beans canning and processing advertisement.