Great thread!
My first 10-speed was a new white/orange Record, early '70s. It was a real tank and I used it to deliver papers and travel all over town as a kid. It replaced the hand-me-down Sears 5-speed from my brother. I recall the Record as being a very heavy but indestructible bike that rode well (but didn't stop well).
Years later, I got a used Grand Prix of the same era, which I still own. It's too nice to call a "beater" bike, but it's one that I would recommend for that type of rough riding.
Best Wishes.