Denny Moorehouse and his partner, Shirley Smith, started making pitons in a disused cinema at a place called Deniolen in North Wales, circa 1966. Back then the vast majority of pitons being used in the UK were imported, mainly from companies like Stubai in Austria and Cassin in Italy. Denny and Shirley used the name of a local cliff, Clogwyn Du’r Arddu, for the name of their company, shortening it to Clogwyn, and then simply Clog.

Clog went on to produce a vast array of pitons along with a variety of other climbing equipment, examples of which can be found elsewhere in the collection. Dating from around 1970, we are fairly sure that we have two Offset Eye Knifeblades here in the collection, though we would need a micrometer to measure the blade thickness to be 100% sure!

More information in the extract above. It comes from a 1972 Graham Tiso catalogue.