... I just checked the 3 dynos in my garage and the badge says Santa Ana, California and I didn't see any made in china stickers on any tube.
When I was younger I worked in the GT bicycle warehouse in Santa Ana. Dyno and Powerlight bikes were in that warehouse also. Sometimes I had to go to the Huntington Beach warehouse and I saw many bikes being made there. Not only assembled but saw people tig welding frames. I can't confirm or remember if they were cruisers, mountain, street, or bmx frames though.
which ever, dyno is still one of my favorite cruiser frames