I show box and ammo of this type…
Headstamp is LM 4-76 5.56
The Lot is from 1977, but cases from 1976.
1 ALM 77 = 1.Lot Atelier Le Mans
LAM CHA = lame chargeur (on clips/Ladestreifen)
Etuis acier = Cases from Steel
Balles = Bullet , T = traceuse/tracer Model F1 from Le Mans