A mid 20th century topaz bar brooch by Wiwen Nilsson, the gold bar brooch with bloomed finish and centred with a square-cut topaz in a stepped collet, maker’s mark, Swedish control mark and ‘L’ stamp for Landskrona, stamped ‘18k’ and ‘SWEDEN’, length 7.5cm. £700-£900

Karl Edvin (Wiwen) Nilsson (19 May 1897 in Copenhagen - 8 January 1974) was a Swedish silversmith and jeweller. He learned his trade working for his father Ander Nilsson in Lund, and in 1927, he took over his father's business. Wiwen Nilsson made his debut with his work at the Gothenburg Exhibition in 1923. During the 1940s, he had a store in New York, USA.