I am guessing that a "Continental" BB is 68mm wide, but that's pretty easy to verify. Unlikely, but I suppose it might also mean 35 x 1 metric threading, either anticlockwise fixed cup (Swiss) or clockwise on both sides (French). I am hoping it means ISO 1.375" x 24 TPI, 68mm width. As mentioned by others, a substandard BB shell width is the easiest of these problems to address.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069