Helge wrote: [...] Certificate from a doctor for Hedwig Potthast troops from thin bridge, currently Prenzlau, from 12/02/1945.
You can´t translate the village´s name from Brückentin into "thin bridge" hence "thin= dünn". Brückentin is an urban district of the municipality Wokuhl-Dabelow.
Helge wrote: Original signature of a staff physician (Capt.) and Department of physician supply division 300 troops of the 4th SS-Panzer-Grenadier Division police. (Field post number 34 213)
http://www.militaria321.com
FPNr. 34213
(Mobilmachung-1.1.1940) Stab Nachschub-Kolonne Abteilung 625,
(28.4.1940-19.9.1940) Stab Infanterie-Divisions-Nachschubfuhrer300,
(1.10.1940-27.2.1941) Stab Divisions-Nachschubfuhrer 300
SS-Polizei-Division,
(8.9.1942-11.3.1943) Kommandeur d. Divisions-Nachschubtrupp 300
(SS-Polizei-Division).