Roy;
On the old Stevens/Springfield note the rear crosspin is higher in the frame than the front one. This gun likely shows an April 1915 patent date & is a model 315. This gun is striker fired rather than having internal hammers.

Stevens 530, 311. Fox B etc all have a similar frame profile but the rear pin is lower, near the bottom of frame & these models all have the internal swinging hammers.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra