Vintage-style octapus necklace

After seeing this necklace on a couple of vintage-style jewellery sites, I saw one in Corporation Street's Cow Vintage store for £9. Similar ones can be found at:

http://www.retro-jewellery.co.uk/large-octopus-necklace-vintage-silver-nautical-jewellery-78-p.asp

http://www.rocknrose.co.uk/products/Octopus-Necklace.html