Real-photo postcard with image of the mill pond and the mills in Star Prairie, St. Croix County, Wisconsin. The still water reflects the mill buildings and trees. Photographer's initials hand-written on front: O.A.O. Printed on Defender paper (this stamp box design used 1920-1945). Unused.

Real-photo postcard with image of buildings and a pond at the trout fish hatchery in Star Prairie, St. Croix County, Wisconsin. Photographer's initials hand-written on front: O.A.O. Printed on Defender paper (this stamp box design used 1920-1945). Unused.

Real-photo postcard with image of the trout ponds in Star Prairie, Wisconsin. Hand-written on front: By O.A.O. Printed on Azo paper with all four triangles pointing up (used 1904-1918). Unused.