The mark after the 830 is the "S", stamped sideways as is sometimes is. The curl of the stem is intentional, fairly common, it is a sugar spoon and probably dates to the late 19th or early 20th Cent. I've seen a few examples of with Tea Leaf form bowls and wonder if those were intended as caddy spoons.
We have a beautiful David-Andersen example of the same form with plique a jour enamel work at ->
http://www.925-1000.com/david-andersen_X1.htmlregards, Tom