My first machine was an Elna Air Electronic in the early 80's. That taught me what good machines Elnas are. It came with a nice selection of cams. When I started collecting in the first few machines I came across an Elna Supermatic for 5.00 and a Elna Special for 20.00. The Supermatic takes cams, the Special is a pink top just like the blue but isn't able to use cams so has just a few basic stitches. I fixed up the Special for my grown up daughter and she loves it. I have since nabbed 2 of the Supers. I figure if she ever gets truly into sewing other than mending she can trade up for the Super and I will still have one for me!
On another Elna specific group I visit, the Super is held in very high regard.
It's worth cleaning up and holding onto!