The 9x20 ammo boxes may be found in two forms and many labels. The only thing in common is that they are packed for 28 rounds in 4 rows. 4x7 rounds makes 4 filled mags for the m/07 pistol.
The old style of box is placed
in Ptrlåda m/98 (Ammobox m/98) and contains 2940 cartridges.
The modern brown box is packed 28 boxes in a soft plastic container and two of those is packed in Ptrlåda
907 which gives totally 840 cartridges in one box.