Vintage ceramic mugs

Four vintage enamelled sandstone mugs by roger guérin, belgian ceramicist. Beautiful handicraft set with all the imperfections of an artisanal object that give it its unique ness and inimitable charm. Width without the 8cm cove. Weight 1.6kg. Try to best describe the particularities (negative or positive) of this object, however do not hesitate to contact me if you wish for further details or photos that I could have oforzed; I would be happy to respond as soon as possible. Ref 347f.