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I haven't seen these for years. The specification note regarding the aforementioned touring frame. Note the tube being 531st and the pin size of 27.0mm.

I served an apprenticeship with one of the last bicycle companies in Britain producing steel frames before moving on to a bespoke workshop in the city of Salford. They were exciting times but the pay and conditions were somewhat Dickensian and after my father died in 1988 I was in a position to...

During the late 1980's through the mid 90's, I built a reasonable number of frames under the Proteus badge. Bear in mind that it was pre internet and at that time I had no knowledge of the American company. This particular frame produced out of the Warrington workshop in February of 1992 was...

Your Proteus was built in Warrington in Hi. Your Proteus frame was built in Warrington in February of 1992. The tubes were 531 Super Tourist 19/22g main tubes. These tubes have a thicker wall thickness than the lighter guage 531 Competition and after clearing post production take a 27.0mm seat...