What are the Thumb, Rocker, Tang or Slide, Trigger Guard Safety in the Sheridan Line Rifles?

A look at the different Sheridan into Crosman made Sheridan rifle safety’s for different era rifles.
SLIGHT ERROR ON THE FIRST AND SECOND RIFLE SAFETY DATES IN THE VIDEO. SHOULD HAVE BEEN: 1949 to 1962 and 1963 to 1990.