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Supermodel No. 90 Poly Spiral Guilloche Machine

This is the fifth model in the Spiral Guilloche family. It was in fact easier to build than its predecessor and now incorporates gearing that allows the speed of the bumper wheel to be altered. Some of the construction is similar to Supermodel No. 88. As the original instructions were somewhat sparse I think that Andreas has assumed that one had already built the previous model.

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