Hi, all three are the steam whistle type.
#566 1951-55 light green base, dark green 1954, had the Santa FE PA with Steam loco on bridge in back ground
#568 1956, 4-8-4 steam loco on billboard
#577 before WWII, then 1946-50, four different billboards:
Ringling Bros and Barnum & Bailey TypeI die-cast frame, Type II pressed steel
G. Fox and Co.
American Flyer Trains
They also made a non-illuminated version 1950 #577NL
Hope this helps.
Irontooth
PS #762 Two in one Whistle