Scottish provincial marks are always something of a minefield, with silversmiths moving from town to town, tinker's marks, poor quality punches (often but not always) and only a localised system of standards.
There are at least three towns that used the Anchor mark, Greenock, Paisley and Dumfries (Fouled).
The definitive work on the subject is Richard Turner's excellent "A Directory of Scottish Provincial Silversmiths & Their Marks" but I cannot find a match for this mark.
The latter years of the 17th Century and the early years of the 18th Century saw the emigration of many Scottish silversmiths to the colonies, they often continued to use similar marks to that they used in their mother country, several went to India including William Henry Twentyman who used the "Fouled Anchor" mark and John Mair the "Thistle" mark, others used the "Lion Rampant".
Your spoon appears to have the makers mark of JH. Among the silversmiths that set up in India was John Hunt who was working in Calcutta in the early 1800's, I don't have a copy of his mark to hand and I offer this as only a very slim possibility.
Hopefully someone will offer something more concrete.