This is a very old unused colour postcard of Old Inverlochy Castle, Fort William. I don't know the exact age of this card, but it looks like it is from the very early 1900s. It was published by Stewart & Woolf, London, Series no 1278, and the card is in very good condition - no creases or obvious marks (other than a couple of minor ones, including faint album marks), with only very slight scuffing to some corners.
(E160)