Manufactured in 1960, this Winchester Model 61 features a unique "experimental" type barrel chambered for the .22 Winchester Magnum Rimfire cartridge. The barrel lacks the standard inscription and is simply hand stamped ".22 W.M.R." on the left side with Winchester "WP" proofs on the barrel and receiver at the breech. Similar experimental style barrel markings are pictured on page 90 of "Winchester Slide Action Rifles: Volume II" by Ned Schwing. Beaded blade front and elevation adjustable rear notch sights, groove top receiver, and serrated trigger and hammer catch. 17 groove slide handle and smooth pistol grip stock with checkered Winchester composite buttplate.