A bit of nostalgia
Besides being a commercial site with exquisite items for sale, Geoffrey Flack's Fine Stamps & Postal History is a magnificient read for any historian, stamp collector, antique dealer or the average tibetanist like yours truly. It conveniently gathers (and offers for sale) the relevant philatelic literature for Tibet, houses high resolution images of banknotes, stamps (rare forgeries included), even letters of the Manchurian ambans to Nepal – and the list goes on and on. If you don't belong to any of the above categories, do not run away just yet. Stamps and other collectables from the Princely States of India, Nepal and the Himalayas, Thailand and South East Asia are a rare sight by any standard. I have spent at least an hour browsing through this site savouring that long-lost feeling of excitement a certain eight year old experienced when consulting a tattered Zumstein catalogue for stamps recently acquired from his uncle.