TN 61
The TN 61 was a French thermonuclear warhead with a 1 to 1.2 megaton yield. It was a lighter version of the TN 60 which it replaced.
The TN 61 was in service from 1977 and 1991. It armed the M20 SLBM carried by the Redoutable-class SSBNs and the S3 IRBM.