German Banknotes With Waffen SS Overprint/Stamp

Hyperinflation notes should have been long gone by the time the Nazis came to power; I can't see any reason why they'd re-use or re-purpose banknotes of what they would have regarded as a discredited, failed regime (the Weimar Republic) rather than simply destroying them.

Sounds fake to me; a pathetic attempt at hyping the value of cheap common hyperinflation notes by somehow linking them to the Nazis.

Hi all, hoping for some expert guidance here.

I'm a collector based in Barcelona and I've come across two Dutch banknotes for sale from two different local vendors, both bearing what appears to be the same Waffen-SS circular stamp — blue ink, eagle and swastika motif, with unit text around the circumference that appears to read something close to "II-Totenkopf-Sturmbann" though I can't confirm this with certainty from the photos.

The two notes are:
Note 1: A 1938 Dutch Zilverbon 2.50 Gulden — pre-war note, so the occupation timeline works cleanly.

Note 2: A 1 Gulden Muntbiljet issued under the Royal Decree of 18 mei 1945 — printed in London by Thomas de La Rue after liberation. The Netherlands was liberated May 5, 1945. This note couldn't have existed before May 18 at the earliest, making it physically impossible for an active SS unit to have stamped it during occupation.

The stamps on both notes appear identical in design, ink color, and circumference text.

My concern: if Note 2's stamp is impossible to authenticate, it was likely applied post-war using a replica stamp. But that raises the question of whether Note 1's stamp is equally suspect, given they appear to come from the same stamp.
I have no expertise in verifying SS administrative stamps. My questions:

Are there known catalogs or reference materials for Waffen-SS unit stamps that could identify this specific unit?

Is there a way to distinguish genuine occupation-era ink from modern replica stamps?

How common is it for dealers to add SS stamps to Dutch occupation currency to increase value?

I'm attaching photos of both stamps for reference. Any help appreciated.

Apparently, many of the stamps that are used to make these countermarkings were mass-produced in Poland and Eastern Europe, for sale to Western souvenir-hunters after the Cold War.

The second word on this stamp after "Totenkopfsturmbann" is "Buchenwald" - this particular stamp claims to be issued for/from the Buchenwald concentration camp. There is literally no reason why the SS in this camp would have stamped Dutch notes. While this camp did indeed hold many Dutch prisoners, any money used within the camp would have been Lagergeld (camp scrip), denominated in German currency. And any Dutch notes confiscated from prisoners would have been either destroyed or funnelled towards Nazi espionage operations, rather than stamped like this.

to the Community, ninjabeerfiesta!