New member, thanks for accepting me. I've had these parts about 10 years which were repurposed to a wood working saw. This pedal saw I believe was "Craftsman" built 1900 to 1920. I put these parts online back then and only response that I remember was "a shell ejecting slide with side plate". Wondering if anyone might know more information. Disregard the 2 round studs sticking up, they were "Craftsman" installed for saw operation. Disregard the new socket screws, they replaced the worn out slotted ones. Thanks 4 any help. Photos should enlarge. Short video,