Arvon Block, Great Falls ID: 763 | This file appears in: Arvon Block Arvon Block facade ca. 1991 | Creator: George Forsyth | Date: Jan. 1991 | Source: MT State Historic Preservation Office, Helena, MT Download Original File CreatorGeorge ForsythSourceMT State Historic Preservation Office, Helena, MTDateJan. 1991 "Arvon Block, Great Falls" appears in: Arvon Block