These clones are some of the best machines out there. I disagree with Mickey about the 1.3 amp motor though because the machines I have with a 1.3 or 1.5 amp motor will sew a bumper on a Buick, in other words they will sew whatever you can get under the foot. As for the age, I think Rocsew is probably right. Colors other than the common metallic blue came on the scene in the 60s and continued into the 70s. I have an original hand cranked clone from 1976 that's light green, another uncommon color.
Cari