Sentinel Mark I
2 in. bbl., fixed sights, blue #9350 mfg. 1974-77. 2 in. bbl., fixed sights, nickel #9351 mfg. 1974-77. 3 in. bbl., fixed sights, blue #9352 mfg. 1974 only. 3 in. bbl., fixed sights, nickel #9354 mfg. 1974 only. 4 in. bbl., fixed sights, bl...