set of 6 stamps and Block from Republic of Tchad , issued 27.12.1983 

overprinted on the same stamps of 24.12.1982  

" A. Karpov , B. Spasski , F. Philidor , P. Morphy , H. Staunton , J.R. Capablanca , V. Kortschnoi "

For the " 60th anniversary of the International Chess Federation "

 

perfect conditions