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Vitrum Signum, as it has been known for many years, first appeared in the early seventies as Camden Workshops, to provide a specialist service to enamellers both in the UK and worldwide.
The tradition of personal service (provided by Diatherm since at least 1895) will be carried on under the ownership of David Alexander-Smith. A potted history of Diatherm can be found on www.diatherm.com.