the product I am referring to is your re-creation of the old Berns and Martin design in your line of Brown Shoe Corporation Shoulder and Belt Holsters. For the uninitiated or younger persons interested, required or desirous of revolver carry methods, the Berns and Martin pattern used a highly developed internal spring mechanism to secure the firearm. they were popular in the 60's for upside down shoulder carry, a then radical departure from normal carry methods. the belt system supplied some firearm retention, only allowing a frontal draw by the wearer. To my knowledge, no one has manufactured this system in many years. Those holsters surviving have become coveted collectors' items.