What are the part numbers for the original brick minifigures? I was gifted two containers of assorted LEGO bricks that had some of these:



Apparently these were only made for a few years before the minifigures we know now appeared in 1978. Does anybody know the part number for the legs, torso, and faceless head?

Slightly more info found here: https://en.wikipedia.org/wiki/Lego_minifigure#History
Here are Bricklink entries for the:


legs (#15)
torso (#17)
and head (#3626a)