I've been collecting silver for years, and have had an interest in Scandinavian history since early childhood, perhaps triggered by the Danish part of my heritage. As a souvenir spoon collector, I have many featuring Vikings, their ships, etc. - and also a collection of silver, pewter and celluloid open salts in the form of tiny longboats/longships, most with matching salt spoons. The one featured today is an early 20th century piece by Marius Hammer (1847-1927), beautifully crafted of .830 fineness silver, it's a less realistic shape than many of the Viking Ship salts, but more practical with its shallow wide body, still retaining a light gold-wash and its original clear glass liner. The tiny fierce dragon heads with their ribbed rings have wonderful detail, and the simple gold-washed ball-twist spoon has a bowl formed from a 1911 10 Ore coin. The same design salt (missing the rings and liner) is shown in Heacock & Johnson's
5,000 Open Salts, #4261.
The Marius Hammer workshop in Bergen, Norway opened in 1871, with production of quality pieces until 1930, the marks used were a conjoined hammer/M, "MH", or "M.HAMMER". Here's a great website, The Online Encyclopedia of Silver Marks, Hallmarks & Makers' Marks:
http://www.925-1000.com/.
This is a 1904 ad for Hammer, noting his specialties and achievements, the 1811 start of the family firm (by Søren Hammer), and the endorsement of King Edward VII.
5,000 Open Salts: A Collector's Guide by Heacock & Johnson is usually considered the salt collector's "Bible" and invaluable for research;
The Open Salt Compendium by Jzyk & Robertson is a luscious volume, filled with color photographs of beautiful and often uncommon salts.