I think there were lots of makers of bullmoose style bars. I have a set that look exactly like TIG welded Ritcheys but are labeled WIN 22.2. Nitto made bullmoose bars as well. I've seen several in 21.1 with no markings whatsoever. Those likely came off the Firenze MT-505 abonimation that was available in the late 80's. Some I've even seen with a riser bar bend to the handlebar portion....