- Robert E. Petersen Collection
- Ancient Firearms - 1350 to 1700
- Road to American Liberty - 1700 to 1780
- A Prospering New Republic - 1780 to 1860
- The American West - 1850 to 1900
- Innovation, Oddities and Competition
- Theodore Roosevelt and Elegant Arms - 1880s to 1920s
- World War I and Firearms Innovation
- WWII, Korea, Vietnam and Beyond - 1940 to Present
- For the Fun of It
- Modern Firearms - 1950 to Present
- Hollywood Guns
- A Nation Asunder - 1861 to 1865
Winchester Model 21 Pachmayr Shotgun - 20 ga.
Small game inlay; "Robert Petersen" on grip cap.
For several years, Winchester engineers had been developing a double barrel hammerless shotgun that for perfection of design, simplicity of parts, quality of material and precision of manufacture would be outstanding in this type of arm. The first announcement of such a model was made in the Winchester price list of January 2, 1931, the Winchester Model 21 Shotgun. The Model 21 was the first double barrel shotgun manufactured in the Winchester plant. The only previous double barrel shotguns to bear the Winchester name were of the breech loading type with visible hammers and hammerless - Winchester Firearms
Model 21 was "the last American classic." Winchester was struggling to keep up after WWI, and making a double barrel shotgun instead of a repeated seemed foolhardy at the time. Designed by Thomas Crossley Johnson, William Roehmer and George Lewis. Model 21 might have failed to sell except that John Merrill Olin took interest; in December 1931, he purchased Winchester for $8.1 million. Olin was already a successful manufacturer of powder and brass, family owned the Western Cartridge Company. He expanded production and promotion of the Model 21, and (not simply with this gun) turned Winchester's fortunes around. Mechanics of Model 21 remained largely the same, although in 1934 Olin met Frank Parker and had Parke redesign the buttstock.