This is a very old unused black & white/sepia postcard of Altachorvie Guest House of the Holiday Fellowship, Lamlash. I don't know the exact age of this card, but it looks like it is from the very early 1900s. It is numbered Lmh.29 and the card is in very good condition - no creases or obvious marks, with only slight scuffing to some corners. 
(E211)