£2,000
1930 (Oct 30) Karachi to Singapore R.A.F Demonstration Flight, cover flown from Karachi to Bangkok with KGV 1a cancelled at Karachi (Oct 28) and Siam 2s + 3s cancelled at Bangkok (Nov 7), despatch and arrival backstamps with red boxed cachet "Phya Thai Palace / MAIL SERVICE / Recd at 16.30 / Date: NOV 8 1930". Fine and rare, just ten covers flown, four of which received the Phya Thai Palace cachet. Photo on Page 170.
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