As an engineering toolmaker, Geoff was very familiar with machining metals and preferred mouthpieces made from metal bar stock, finished in gold plate and sometimes silver plate.   Over time he experimented with different materials and added various alternatives to the product line, perhaps in response to customer demand.

Information from Lawton advertising material and statements attributed to Geoff Lawton in interviews are not fully consistent and clear but we have used such sources to produce the timeline below.