Found a Saronni recently. Like others before me, I wonder who made it. Unfortunately I can no longer see the pictures others posted.
Mine has heart-shaped cutouts in the lugs, SARONNI etched deep in the tops of the seatstays and stamped into the dropouts. I haven't yet found any clubs or other identifying marks.
It's got a chromed fork with a sticker that says "Columbus Foderi Cromor".
And a crack at the top of the seattube which I hope is just in the paint.