The earliest I can remember was Hondo, the 1953 John Wayne western. I was 4 years old.

I saw the 3-D version, and my only memories of the film was how uncomfortable the huge glasses were (I had trouble seeing through both lenses at the same time), and the 3-D effect when an Indian arrow struck a cabin door.

You'd think that sometime in the last 58 years I'd have seen it Hondo again, either on TV or DVD, but I haven't.