All square spindles have a 2-degree taper, but there are at least two different standards for the terminal width. The other variables are total spindle length and distance between the bearing races. Nervar Cranks should work fine on TA spindles, and vice-versa, and the cups should be interchangeable, as well.
__________________
"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