Hello,
I think the right caption is 162 au jus et la fuite pour la 27/2.
Young people were belonging to an age group, named "la classe", 20 years after their birth, and then incorporated every peers month. Talking about his National Service, a young French said "I belong to the 27/2 class" (j'appartiens à la classe 27/2) meaning: "I have done my National Service in 1927 and have been incorporated in February (or maybe in the second wave, in April)".
Regards
Noir 7