Vintage Solid Silver Oval Malachite Cufflinks 1970s

A vintage pair of Continental silver and malachite cufflinks - each cufflink consisting of an oval cabochon of malachite set in a domed brushed silver border and with a prong lever back fitting - marked 835 for Continental silver together with an unidentified makers mark - total weight of the pair 17.2grms - overall dimensions 17 x 13mm - c.1970 Germany