REI aluminum carabiner. Maker's mark 'RECREATIONAL EQUIPMENT INC' stamped on one side. Marked with a wrap of red and white tape. Exact date of production unknown.
Chouinard Alcoa aluminum carabiner. Maker's mark 'Chouinard' stamped on one side, '820 ALCOA 7075' stamped on reverse. Marked with a wrap of red and white tape. Exact date unknown but likely produced between 1958-1968.
SMC (Seattle Manufacturing Corporation) aluminum carabiner with screw gate and pulley. Maker's mark 'SMC' stamped on one side. Exact date of production unknown, but likely between the 1970s-1990s.