Originally Posted by Mark II

You've both caught on to my quiz question. To recap: in either the 1979 and 1980 Estes catalogs, how many Alpha models do you count?

I count at least 5 and possibly 6.

1. Alpha
2. Alpha III
3. Maxi Alpha
4. Maxi Alpha III
5. K-07B Phantom (Clear Alpha), and possibly
6. Colossus (stretched Maxi Alpha III)

I briefly considered the Quasar, but decided that the clipped fins kept it out of the family. The Alpha and its kin use oblique trapezoid fins; the Quasar used clipped trapezoid fins. The two shapes are related, but that doesn't make rockets that have either one related. It might be more accurate to call the Quasar an upscaled Mark.