In fact I do have the fork (not sure if it's the one that came with the bike originally though), yet it is even less "telling": it has suffered a thick, ugly paint in pitch black, yet the Campagnolo dropouts can still be recognized by their shape, and if you look very sharp you can indeed read the 'Campagnolo' engraving on them beneath all that paint - other than that there too no panto, no flower or "=SOMEC=" engraving anywhere to be seen...

Here's some pictures of the fork:



I have asked Somec for further support to identify model and date of the frame, I haven't found a code stamp or any other potential identifier, but as said they themselves have confirmed that this is a Somec frame by the above pictures I have sent them, so I'm curious how this quest develops... ;-)