Ah-hah(!), I had slightly suspected that, 'cept that the one on my recent Merckx purchase had the adjustable ball-bearing pullies that I had believed only were used on C-Record mech's(?).

Could have been an upgrade by the owner I suppose.

Athena it is then. What a gruppo.
But, would the Athena hubs also have had the dust clips that are on this one's hubs???