India. (Bhutan Leasehold). 1908. Indian KEV11 postal stationery envelope 'half anna' green upgraded with SG 148, 1/2d green tied by Kalimpong date stamp '28 July 08' with framed instructional 'Too Late' on face addressed to London, Scarce item from Kalimpong a Bhutan leasehold territory on the Sikkimese/ Bhutanese border.