Belgian bikes:
http://www.wooljersey.com/gallery/v/...Belgian+bikes/

http://www.wooljersey.com/gallery/v/...etsen/Cornelo/

http://www.wooljersey.com/gallery/v/...orges+Pintens/

http://www.wooljersey.com/gallery/v/...inqueuer+1983/

http://www.wooljersey.com/gallery/v/...tsen/Splendor/

In the 70s, and early 80s, there were still a lot of pro teams sponsored by and supplied with Belgian bikes: Flandria, Superia, Norta, Ludo, Splendor, Plum, Carlos, Fangio, etc.
Splendor was a big bike manufacturer, but the Splendor race frames were made by Martens (now Martelly), they probably made a lot of frames for other teams too. Martens also made frames for shops, like the Pintens.
Carlos was basically a French make, close to the Belgian border. Boston were the bikes that had the first complete Mavic gruppo (Boston-Mavic), but what Boston was, and who made the frames, i don't know.
The Clemenso history is well described on the net.

Looked at this way, Merckx frames are newcomers ...

So, basically, i have tidbits of knowledge and wish i had found out more back in the day ...