When the English took over parts of India in the eighteenth century, some of those to follow included craft and tradesmen. This included silversmiths. They would make silver in India, but for the English clientele there, so it would follow English styles. Their makers' marks also follow the English type, but were not legally mandated. These marks are known as pseudo hallmarks and were found in my of the English colonies.
One of the early silversmiths was the maker of this spoon. John Mair was working in Calcutta from 1789 until around 1801. A nice early piece of Indian colonial silver.
In great overall condition, two of the pseduo marks are very clear. The third, a thistle, is rubbed but readable.
It measures 22cm long and weighs 58 grams.