@wahlbornwi-rr-com Well, mine was built along side yours, at the time... DMC had a few issues towards the end of their run. This thread captures my journey with them, at the time. Jonny tried hard to fix the owner's bad decisions, but ultimately had to live with him until the end: It got kind of ugly.
Yes.....was horrible 
His was built in texas but basically same design on the frame minus few improvements i did for tsc
Is this on a Watsonian Frame or a DMC?
I'd be saying DMC.
Other's will confirm.
I must concur with my Western Australia mate....it's a DMC frame.
A "real" Watsonian sidecar frame would have been fabricated by Watsonian Sidecars in the UK.
Two Million Mile Rider
Exploring the World in Comfort
Appears to be a dmc frame the bumper is a giveaway since not part of the frame. From what I have heard tsc is no longer an authorized mfg for watsonian that partnership has ended. Probably wont be see anymore of the American made version