Pair of officers-type shoulderstraps: 'Sicherheitsdienst'- (ie. 'SD'-) related so-called: 'Schützmannschaften'

This is a very attractive - and actually very rarely encountered! - pair of officers-type shoulderstraps as was specifically intended for usage by a commissioned-member (ie. officer) who served within the notorious 'Sicherheitsdienst'- (ie. 'SD'-) related so-called: 'Schützmannschaften' (ie. 'Schuma') and that comes in an overall very nice- (and I deem only minimally used- ie. worn-), condition. The 'pointed-styled' straps - which measure approximately 12,2 cms. in length each - have (as to expected) the black-coloured- and smooth woolen-based 'upperdecks' and do show the (neatly hand-embroidered!) diamond-shaped swastika-signs (as executed in silverish-grey braid as can be seen on the pictures). The neat pair comes mounted onto its functional tongues and does show the silver-toned, twisted 'braid-based'-type piping attached (as always with these Schuma officers-type straps). The pair shows the black-coloured- (ie. 'Waffen-SS'-related!) 'upperdecks' and as such signified the close interrelation between the - notorious! - 'Schuma'-units and the German police (ie. 'Polizei') ie. Waffen-SS and/or SD-units. The pair is in my opinion only minimally used and does show some minimal age, wear and/or staining. These notorious 'Schützmannschaften' (ie. 'Schuma') were staffed with men entirely coming from the Baltic states and had a very bad reputation. In any case is this a sound opportunity to acquire a very rarely encountered pair of minimally used SD-related officers-type shoulderstraps: only the second such rare pair I ever had on offer!