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- 1-12. 1928 Provisional issue. Forged overprint. Varro Tyler, Linn’s Focus on Forgeries: A Guide to Forgeries of Common Stamps, Revised, Expanded Edition, p.7. Ernesto Fink, “Spanish Andorra: You Don’t Have to Be Afraid of the Overprints”, American Philatelist, Vol. 106 (January 1992): 35. Forgery of the control number and/or overprint: W.A. Jacques, Andorra—Andorre (Robson Lowe Ltd., London 1974): 18,19, Photos 5,6,7; forged controls on specimens: 1985 Supplement and Price Guide, p.S10.
- 13-36. Pictorial Series, 1929 (with control number, except the 2c) and 1936-43 (without control number). Altered stamps, forged control numbers, private reprints of the peseta values: W.A. Jacques, Andorra—Andorre (Robson Lowe Ltd., London 1974): 19-21.
- 62. Europa Issue, 1972. Alec Jacques, “Spanish Bureau – The 1972 Europa Forgery“, Bulletin of the The Andorran Philatelic Study Circle, Issue No. 29 (March 1989).
- Genuine and forged postmarks of the Spanish Post Office: W.A. Jacques, Andorra—Andorre (Robson Lowe Ltd., London 1974): 56-59,62,63, and on pp.S23 and S24 of the 1985 Supplement and Price Guide; correction to p.58 is on p.S3.
Source: The Tedesco Index