As confirmed by the copy of a letter from Eugene F. Williams, Jr., this experimental shotgun was once the personal property of the late John M. Olin. The shotgun features an experimental aluminum Winchoke barrel which has a 2 3/4 inch chamber. The barrel has the Winchester legend on the left side and factory proofs are present on the left side of the barrel and receiver at the breech. The special straight grip stock has a "JMO" initial oval for John M. Olin on the underside and is fitted with a leather covered pad. Note that standard production Model 1200s had a pistol grip stock. The high grade walnut forearm and stock are checkered. Length of pull is 14 inches.