Genuine vs. Forgeries
1st set of forgeries. Thick fiberous paper. Appeared March 1958. 7-lines radiotelegraphic genuine postmark.
1st set of forgeries. Thick fiberous paper. Appeared March 1958. Genuine Lhasa postmark. Exist with genuine Type VII ( T15 ) and VIII (T42) Lhasa postmarks.
1st set of forgeries.
Appeared March 1958. Sheets lacks the rough marginal framing. Six clichés in the sheet.
4th set of forgeries. Appeared late 1982. Six different clichés pr sheet. Sheets are only known unused.
4th set of forgeries on forged cover. Both stamp and postmark are forged.
Thanks to Bo Olsson for images and analysis of Tibetan forgeries