I have learned a ton about the evolution of the game. My interest started when I found a set of my original figures from WAY back. They included what are known as hog leg and chicken leg figures. 67 big men are just that slightly taller and beefier and were produced in 1967. The folks here are incredibly helpful and knowledgeable. From left to right 1967 BM, Haiti white shoe mid 1970s not sure exact year, 1968 or 1969 hog leg, 1970 or 1971 chicken leg. Easy rule of thumb is black shoe figures are the earliest. Again follow the links they are very helpful.