The Cordings cufflinks are the result of a rare and highly skilled hand type of work know as vitreous enamelling also known as hard enamel. Vitreous enamel is glass,its colours come from the inclusion of metallic oxides. The application of vitreous enamel is time consuming and requires great patience.All the processes are done by hand and eye with no mechanical or automated assistance. The glass must first be ground to a very fine powder,mixed with distilled water and applied to the prepared metal background,when the water evaporates the metal is heated with a gas torch to approximately 800 degrees centigrade,this causes the glass to fuse onto the metal.This process has to be repeated many times on each piece in order to build up the depth of enamel,finally the surface is ground with carborundum then re-fired to obtain the bright finish the cufflinks display.The application of different colours into their separate divisions or "cloisons" must be executed without a single grain of colour spilling into the adjoining cloison otherwise the piece will be ruined. Read More SpecificationSterling Silver English Hallmark Movable Wheels Red Enamel Care GuideIn order to care for your silver cufflinks use household silver polish applied and rubbed off with a soft cloth. Delivery and Returns UK Mainland: Fully Tracked via DPD £7 | 2 – 4 working days UK Extended Areas: Fully Tracked via DPD £15 | 3 – 5 working days Click & Collect: 19 Piccadilly, London Free | 2 - 4 working days International Standard: Calculated at Checkout | 3 - 6 working days International Express*: Calculated at Checkout | 2 - 3 working days *Selected Countries Only Returns: We offer a no quibble guarantee and would be happy to offer a refund if you are not happy with your goods. Please note: You are responsible for the costs of returning goods to us. For more information on returns please click here Vintage Tractor Cufflinks with Movable Wheels