Variation no. 1
Frog for the M/1950 bayonet, marked FKF and 1956. FKF is short for Forsvarets Krigsmateriel Forvaltning, the name used between 1952 and 1961 for Hærens Tekniske Korps.
The backside of bayonet frog produced by FKF
Variation no. 2
Frog for the M/1950 bayonet, marked HMAK, HMAK is short for Hærens Materielkommando. HMAK was the Danish army material command between 1967 and 2006.
Backside of frog marked HMAK
More information on the Danish M/1950 bayonet you will find here.