This was their basic model with a hi-tensile steel frame. From memory, the line-up went Super Speed...Skyway...HillTopper...Diamond Touring...Diamond Racing. There was also the Submariner with distinctive stainless steel main tubes. It would have come with steel rims, without quick release hubs, and a steel crank set. You can put standard, basic stuff on it and the best advise is don't spend alot of cash on it. Smartest thing would be to use good condition salvaged parts that are as near to free as you can get. Here's a few of pictures of a stock Mixte frame version in excellent original condition. Hope they are of use.