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Aha, didn't know about that feature. Makes my Super pre-83 as it has fluted, stamped seat stay caps.
Had a look at the 1986 catalog to find out what groupset could have been on my Master (headset looks like C Record but original wheel -rim is Ambrosio Metamorphosis "Colnago Corse"- has a Record hub old style) so it seems I can keep it era correct by putting a Superrecord on it (so I won't no longer be tempted to spend too much money on a Corsa Record first gen).
I think your Saronni red one is even older (82?) as the headtube lug on the 83 (and later) models don't have the "dent".