I've got several Officer Model match revolvers in .38 and .22. Have a Model "357" 4 inch, and a "second series" Detective Special made in mid-60s. I think they all have the same basic lockwork. I'm wondering--who designed this interesting V-spring DA lockwork? What year was it introduced? Did any other company use it, or a variant of it? And was there an particular reason it was chosen? I know the Colts were popular in Bullseye shooting because they are so easy to cock for single action firing. Was this lockwork chosen for that reason, back when DA firing was something of a novelty?Thanks!