Lot of four, each approx. 3.5x5.5" and dating to 1900-1915. Real photo postcard shows Daisy Manufacturing Co. factory in Plymouth, MI, complete w/"Daisy Air Rifles" water tower. Pencil note on back reads "This Is Where They Make Air Rifles." Some lt. corner tip wear w/moisture staining along lower left, though this blends somewhat on front. Fine. Other postcards show Winchester Repeating Arms Co. factory in New Haven, CT; "The Gun Works" Driggs-Seabury's Ordinance plant in Sharon, PA (sold to Savage Arms in the early 1900s); and the DuPont Powder Company factory in Hopewell, VA. All are unused and evenly aged. Some scattered wear. Fine to VF overall.