Airweight Model 37 In 1951, Smith & Wesson introduced the Model 37, which was basically the Model 36 design with an aluminum frame and cylinder. The aluminum cylinders proved to be problematic and were abandoned in favor of a steel cylinder.
Model 36-6 Target This variant had a 3-inch full lug barrel with adjustable sights and a blued glass finish. Approximately 615 Model 36-6 Target variations were produced.
Model 36 Gold In 2002, Smith & Wesson reintroduced the Model 36 with gold features (hammer, thumbpiece, extractor, and trigger). The gold color was actually titanium nitride.
Texas Hold 'Em Introduced in 2005, it was produced with a blued finish, imitation ivory grips, and 24k gold plate engraving.
Spanish Astra copies In 1958, Spanish manufacturer
Astra developed a high quality revolver line based on this weapon, under the name of Astra Cadix, Astra 250 and Astra NC6. ==Engineering and production changes==