Probably the skull of a Neanderthal and the celebrity antropologist ;

 17.6.1969 - Important persons.
 
1,80 K., Paleoanthropologist A. Hrdlika with human skull (Homo sapiens sapiens).
 
Part of a set of 6 val. - commemmoratives.
 
Scott: 1632.
Stanley Gibbons: 1833.

Yvert nº. 1729