Reference: CMP seat back coil spring dimensions

[Alex van de Wetering]

Attached are the rings and springs Hanno and I bought for our seats. Credits go to the Dutch Morris owner that found the suitable springs, as mentioned earlier in this thread.

Both springs and rings are Metric measurements, but they are pretty much spot on when compared to the originals, especially when you take production tolerances of the time into consideration.

I decided to use 1 type/length of spring, in stead of the 2, or sometimes 3, different lenghts used in the originals. I just stretched some of the springs to match the longer ones.....just put a screw driver in the vice; put one spring eye over the screwdriver, and use a second screwdriver through the other eye...than slowly pull and check against the original springs.

Alex