I used to have a 50's King Mortone plywood violin-shaped upright. It was smaller than a 3/4 and had a sweet tone. Wish I still had it but that's another story…
Mine's a Romanian shop bass, fully carved. Same period, I'd imagine, and on the small end of being a 3/4. It's ridiculously loud and very full, with amazing growl, loves guts! You wouldn't think such a loud tone could come from such a small bass. I love it to bits (which is how I found it!)