1947 Air Letter Sheet

sALS 1

Some examples have a paper-maker's watermark which reads "PERMANIZED / ARTESIAN BOND / RAG CONTENT".

It is believed by Walter Guthrie, an air letter sheet collector and dealer, that about 25 examples are in existence[1].

Further reading

  • "Liberia: New Information Comes to Light on Pioneer Aerogrammes" / pp. 114-115 / Aero Philatelist Annals / Apr 1959
  • Kessler's Catalogue of Aerograms, Volume II / Kessler, F.W. / 1968
  • Liberian Postal Stationery / Shoemaker, Dr. Robert E. / 2012

References

1. "Liberia: New Information Comes to Light on Pioneer Aerogrammes" / pp. 114-115 / Aero Philatelist Annals / Apr 1959

See also

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