This is a Vintage Norwegian Bon Bon/Jam Spoon. It was made by Thorvald Marthinsen and bears the chalice on the back of the spoon which is maker's mark. It is also marked 830S for silver content. The NM is for Norsk Monster, a type of copyright. The N in a box is for Norway. It could be a jelly/jam spoon as well as a bon bon spoon. This spoon is in great condition. It is 4 7/8 inches long and is 1 3/8 inches at its widest. It weighs 21.61 grams troy. Postage covers all packing materials and the cost of shipping and handling. Thank you for looking.