Vintage / antique sterling silver gilt floral panel necklace - fine jewellery, stunning quality, lion passant hallmark, 57 grams

Beautiful antique book chain and sculptural flower necklace in gold plated / gilded sterling silver with hallmarks. The design is Victorian in some ways, but also perhaps has a touch of Art Nouveau influence, so I am guessing at it having been made towards the end of the 19th century. Each repousse chain link has a sterling silver lion passant stamp and there are also some oval marks which I can't make out that might indicate a maker. The necklace has a choker length of about 16 inches, and fastens with a simple hook at the back. The vintage/antique condition is good, with minor wear to the gilding / gold plate of the chain links, as shown in the pictures. This is a beautiful piece - if you do have any information on the maker or pictures of a similar piece, I would love to hear about it via message!