Unusual, zinc-based WH (Heeres) 'Panzer-Lehr'-related equipment- ie. wash-tag (or: 'Wasch-Marke') bearing the superimposed text: 'I/Pz.Lehr Regt. - 31'

This is a neat - and with certainty unusually found! - typical zinc- (ie. 'Feinzink'-) based, WH (Heeres) 'Panzer o. Panzer-Lehr'-related equipment- ie. wash-tag (or: 'Wasch-Marke') bearing the superimposed (and unique!) stamped text that reads: 'I/Pz.Lehr Regt. - 31' and that comes in an overall nice- (albeit clearly used- ie. worn-), condition. These circular- (and/or square) shaped tags (having an aproximated diameter of 4 cms.) were very popular amongst the troops for obvious reasons but did not see wide-spread usage: the tag originates from a private-household in Germany and belonged with certainty to an tank-soldier who kept this piece as a souvenir for years. I deem that these interesting little WH-equipment-items would merit further investigative work!