@Trinity River Bottoms Boomer posted:
Big John Henry, You're not crazy by any means,nor are you alone in your thinking either! I've wondered this myself.
If OO was already established before WWII, why was HO developed in the first place? NUTS!
I believe OO is 1:76 which makes the gauge of 16.5mm about 4' 1" in the prototype. HO faithfully represents standard gauge at 4' 8.5" to within 4 thousandths of an inch.