A bit of fresh air on this old topic …
I recently got a cardboard box with Danish MG-belts:

Translation of the printed label:
Armed Forces War Material Administration
5 pieces
cartridge belt M/51
(catalog- and stock-number) and
1 piece
starter tab
(catalog- and stock-number)
(for use with 7.62 mm machinegun M/51)
Made by the Arsenal of Weapons
The five M/51-belts are of the known 50 rounds-length connectable type.
The box was packed 1955:

The semi-circular connectors of the belts and the starter tab are similar to the German Gurt 34 (for 7.92x57 machineguns):

And marked with ‘(crown)VA’:

For comparison: The modern versions have ‘noses’ on the different shaped connectors (identical to the belt ‘DM1’ for the MG3 of the German Federal Army):

They are marked ‘(crown)VAR’:

The Danish Let Maskingevær M/62 is similar to the German MG3 (a modified MG42 in 7.62x51). I believe that the newer belts with the ‘noses’ have been accepted together with the MG in 1962. However, I do not know which Danish designation the newer belts got. Maybe ‘patronbånd M/62’?