My renewed interest for this series has arisen from the fact that in 1911 a German paper had been used - for the 1911 Death of D.F. Sarmiento and for all values of the "En Ovalo" series with Rayos Rectos [straight rays]!
The above mentioned stamps have a hitherto unknown type of paper - with Tela instead of the usual Granulado as the paper mesh!
viewtopic.php?f=137&t=5250
The Labrador series started - for the typographed - per 04.12.1911! Some values may have the Tela as well since both the German paper with Rayos Rectos as the Rayos Ondulados are known for the Labrador series!
to be continued....