Going off on a slight tangent - I have never understood why the clever seat belt fastening arrangement found on my SAAB 99 Turbo was never taken up by other manufacturers - and was quietly dropped by SAAB by 1980 or so.
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Owners of certain 1970′s Saabs, especially 99s, would be familiar with one of the more unsightly but incredibly practical seat belts in Saab’s history. The seat belt had no buckle on it, the buckle being in the receiver unit bolted in the floor. As you can see in the photo, this made the receiver unit rather large and unattractive. The good part was that you never had to look/feel for the buckle on the belt. Just grab the belt itself, slot it in and close the buckle."
