Text below from Situationniste Blog:

Tenth issue of Internationale Situationniste. This was one of only two issues (the other being #121 ) to have some copies bound in plain wrappers instead of the typical glossy, SI-branded wrappers.

Such precautions were taken to facilitate clandestine distribution in countries where the S.I.’s subversive political writings may have elicited an undue amount of interest from the authorities. Specifically, the articles “Adresse aux revolutionnaires d’Algerie et de tous les pays” and “les luttes de classes en Algerie” would likely have proven problematic in Algeria.

• 1See: Plankton: The Quarterly Journal of the Plankton Society Vol. XXVII, No. 3 (1969)