I think that this was the second style MM for the period & that it was likely introduced around 1937. I say this because the very early 2nd lufts by pack had the earlier mark but they are rare & it was not long after production began that it changed. The dagger you show does not look like the aluminium model to me either. The swasitika roundels are solid brass disks that are silver plated & pressed in to the pommel.
“If a thief takes your money and you take it back; does that make you also a thief?”
To me it looks like a late dagger with silvered pot metal grip fittings (sunwheels also pot metal with goldwash; discs inlaid) and steel scabbard fittings with silvering. The chain mainly is aluminium in these configurations. It seems to be a quality crossgrained blade which (in my personal opinion) did come before the simply plated blades. Typical PACK manufactured dagger (I do own the same and have had one with plated blade). Regards,
wotan, gd.c-b#105
"Never look for sqare eggs" as an owner of an original FHH-dagger uses to say.