Six generations have been identified:
1. Big Horns : same pickups as conventional Crucianelli solidbodies of 1963, old style rounded headstock, sparkle or perloid plastic finish, body contour à la Stratocaster (1962-63)
2. Big Horns and New Style Pickups, and a zero-fret too (1963)
3. Thin Horns and Old Headstock: well, that sums it up. The narrower upper horn causes the logo to move from body to headstock (1963)
4. New Headstock and Old Controls. Angled headstock, no more body contouring. Lacquered finishes increasingly replace sparkle celluloid (1964-65)
5. No More Rocker Switches, they are substituted with a rotary pickup selector (1965-66)
6. Fake Humbuckers — and Fender style headstock (1966)
Versions #1 to 3 are seen virtually only in Europe. Versions #5 and 6 are mainly found in North America. Type #4 is the least rare on both sides of the water.