52nd Auction - All World stamps & covers - Day 2

Fezzan: 1943, 5 Fr on 50 C black with bottom margin, tied by large double circle to small registered
1943, 5 Fr on 50 C black with bottom margin, tied by large double circle to small registered "sample without value" from Sebha to Yaoundé (Cameroon). Certificate Enzo Diena.
Diena writes, that this is the only known "sample without value" known from the French Occupation of Fezzan and states that only a few "non philatelic" uses of this series exists.