Browning Superposed

The Browning Superposed was a Belgian-produced over-and-under shotgun introduced to the United States two years after the start of the Great Depression, in 1931. Despite its original high cost, it was regarded as a fine and valuable weapon by both shooting competitors and hunters.
The Superposed introduced a wide variety of innovations including the single select trigger and over-under design. This design was considered revolutionary in the 1930s, but Browning had patents on the design long before that, as far back as 1923.