Wellworthy oil grooved and drilled ring, 5" diam
Two Wellworthy superslot oil control rings
Wellworthy bevelled scraper ring, 5" diam
Clupet double coil compression piston ring
Wellworthy stepped scraper ring, 4.5" diam
Wellworthy compression ring, 5.6875" diameter
Clupet slotted scraper piston ring
Clupet double coil compression piston ring
Wellworthy Simplex patent piston ring
1936
Perfex compression piston ring
1920