Built in 531DB on Nervex Pro lugs with the head lug rims retained. The fork crown is a Vagner 12+ fausse saignee’. Full wrapover seatstays with long topeyes. Curved reinforced seat stay bridge and a curved centre pull brake bridge plus a tab with an adjuster screwtapping.
The chainstay bridge is straight. The dropouts are chromed Campagnolo. Only 3 braze-ons, a front derailleur BB guide , chainstay stop/adjuster and front changer cable stop. The forks have a relatively small amount of relief as might be expected on a road machine. The O/S chainstay appears flattened to give clearance to chainset inner ring, a feature I have not seen before on an MN frame though there are a couple with indented slots to do the same job but at rather later dates.
Desireable frame from his rising years.