SS SD 'Sicherheitsdienst' Personnel's Sleeve Diamond (Ärmelraute für SD Mitglieder). The patch is showing neatly machine-embroidered 'SD' (indicating Sicherheits Dienst) in silver-white linnen on a black wool base. This shield originates almost certainly from the SS clothing department at the Dachau KZ when liberated in 1945. Nice example in mint and unissued condition!