I didn't know the Master was produced as early as that and would have said the SR components were incongruous with bike. That being said, Sper Record was still around in the mid-80's. BTW the brakes are Cobalto and have a lot of value. They were introduced about 1985-86 with the C-Record group. If you haven't ridden the Turbo saddle, give it a try, it's one of my favorites.
Nice bike!
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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, '95 Gios Compact Pro, '95 Carrera Zeus, ‘81 Masi Gran Criterium, ‘81 Merckx Pro, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, Rivendell Rambouillet, Heron Randonneur, ‘92 Ciöcc Columbus EL