High Standard revolvers were manufactured in a variety of models in .22 Short, .22 Long Rifle and .22 Magnum chambering from 1955 until the mid-1980s.[3]

In 1957 High Standard introduced new models and finishes: a two-inch snubnosed with round butt, a Western model and the successful “Sentinel”, one feature that boosted sales was its 9-shot capacity, all models had 9-shot cylinders