WH (Heeres) hand-embroidered trade- and/or special-career arm-insignia: 'geprüfter Wallmeister' (or: experienced fortification-construction NCO)

This is an attractive - albeit truly used- and/or worn but nevertheless very scarcely encountered! - WH (Heeres) neatly hand-embroidered, trade- and/or special-career insignia (ie. 'Tätigkeitsabzeichen') as was executed in golden-yellow-coloured (hand-embroidered and linnen-based) thread onto a darker-green-coloured background and that was specifically intended for usage by an army: 'geprüfter Wallmeister' (or: experienced fortification-construction NCO having at least one-years experience in this function) and that comes in an overall nice- (ie. I deem clearly used- and/or carefully tunic-removed-), condition. The patch is as stated neatly hand-embroidered in golden-yellow-coloured linnen onto a darker-green-coloured- and/or woolen-based background and shows an (additionally-added) silver-toned- and (somewhat thicker-styled ie. braid-based) hand-embroidered 'rim' attached as to be expected. The patch - that shows an additional, black-coloured and paper-based 'backing' attached - is totally void of a makers'-designation as more often (as can be seen on the pictures). Simply a very attractive - and actually scarcely encountered! - WH trade- and/or special-career patch (ie. 'Tätigkeitsabzeichen'): one of the more difficult to encounter examples of the extensive series!