I have just carried out a search on this forum on attributable daggers. The search came up with just three topics (admiittedly just using the word attributable), and these didn't have much substance about them.
My observation is that attributable daggers do seem rare - I can't remember the last time I saw one come up for sale other than the Schlotter M36 on Richard Millers website quite a few months ago now.
Is there an added premium on their value?
I would imagine there should be quite "good" premium really owing to the seeming rarity. In fact when did you last see for sale a dagger belonging to just a lowly Untersturmfuhrer.
Just a thought.
S.