@MartyE posted:
I would guess this image is from 1966. My dad, my brother, one of my sisters, and the short pudgy guy is me. Dad had the best layouts. I don't think he ever planned one out. Just started laying track and came up with a design.
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And the nice thing was with three rail your dad didn't have to think about reverse loops and other two rail track "electrical quirks" that could ruin an otherwise interesting running layout.