Many years ago I owned a 20 gauge double branded as Central Arms Co. It was a Stevens model 315 & was a Hammerless being striker fired. This gun was built on patents by G S Lewis of Springfield MA. He had patents #'s 1,086,378 issued Feb 10, 1914 for a coil spring lock & #1,136,247 issued April 20, 1915 for a complete SxS action. there have been a few other striker fired doubles over the years. Not sure, maybe Ted will chime in, but the Darne may be striker fired.
I have never owned a hammer gun with a safety, always cocked at the shot.
