Finnish Heldentod certificate to KIA SS soldier

[Tim DC]

This large (33x24 cm) Finnish Heldentod document was offered to me and though I had never seen it before, I didn't hesitate..
Signed by Carl Gustaf Mannerheim, later Finnish president.
I wanted to ask if anyone has seen this type of document before?

SS-Unterscharführer Karl-Heinz Grimm was KIA on 24th of May 1942 near Kiestinki.

Karl-Heinz Heinrich Albert Grimm ruht auf der Kriegsgräberstätte in Salla.
Endgrablage: Block 1 Reihe 12 Grab 720
Nachname:Grimm
Vorname:Karl-Heinz Heinrich Albert
Dienstgrad:Unterscharführer
Geburtsdatum:17.12.1921
Geburtsort:Rensefeld
Todes-/Vermisstendatum:24.05.1942
Todes-/Vermisstenort: Ostw.Str.Kiestinki-Louhi,14,2 km

[Simon O.]

That's a new one on me too.