More pics would be helpful. Kind of a guess but I think DeRosa branded BB shells are later 80’s. And 90’s . Quick pic of my ‘86 Pro.
One thing I like about our community here is the general tolerance of differences in opinion, forbearance toward what might be called eccentricity without the machismo and calling out that you run across on other forums. Pretty easy to hit the back button and click on another thread.
Underexposed, indoor, slightly blurry photo dedicated to nlerner
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur