I came across this service record posted on another forum and it perfectly illustrates how sometimes tracing actual field units a soldier served with from his Erkennungsmarke can be quite impossible as men didn't always go to the field units a particular Ersatz unit is nominally stated to have supplied:
1. Erkennungsmarke:
-5931-, 2./Pi.Ers. 253
(2. Kompanie Pionier-Ersatz-Bataillon 253)
Truppenteile:
Laut Meldung vom 10.06.1942 -
2. Kompanie Pionier-Ersatz-Bataillon 253
und am 13.07.1942 - Standort: Köln-Westhofen
ab 22.07.1942 )
Stabskompanie Infanterie-Regiment 326
und am 20.08.1942 )
ab 01.04.1943 )
Infanterie-Pionier-Ersatz-Kompanie 5
und am 04.09.1943 ) Standort: Straßburg/Elsass
-Abgang: von der Ersatz- und Ausbildungs-Kompanie 5
zum
Füsilier-Ersatz- und Ausbildung-Bataillon
Oberhofen-ab 29.09.1943 )
Stabskompanie Grenadier-Regiment 326
u. lt. Meldung vom 10.10.1944 ) –Zugang: vom
Grenadier-Ersatz-Batallion 358/ Altkirch.
Das Infanterie- bzw. später Grenadier-
Regiment 326 unterstand der 198. Infanterie Division.
-Einsatzraum: siehe Anlage-
Right off the bat any research would have been derailed as there's no way to predict a man beginning in Pionier-Ersatz-Bataillon 253 would have been posted to
Grenadier-Regiment 326. The movements after that were following wounds received in the field, but he does return to GR 326. If one looks at PEB 253's listing
PiErsBat 253-Lexikon der Wehrmacht 8 Pionier-Bataillone are mentioned as field units it supplied and that's it; it's even in a different Wehrkreis than GR326 so there's just no way to consider GR326 as a possibility, however remote.
One further interesting aspect to this service record is it shows an example of a lost and replaced Erkennungsmarke; there is no mention of the circumstances of the loss, however it is recorded:
2. Erkennungsmarke:
-1-, Stabskp.Gren.Rgt.326 (
für verlorene Erkennungsmarke –5931-)
"for lost Erkennungsmarke", and this proves a man would be issued a disc from his current unit- and further that disc number 1 could simply go to the first man to need a replacement, which this guy clearly was since his new disc's Stammrollennummer is 1.