A Mint “Der Stahlhelm” Silesia Sleeve Insignia

A “Der Stahlhelm” (Der Stahlhelm - Bund der Frontsoldaten/Steel Helmet, League of Front Soldiers) sleeve insignia; constructed of fine quality blue, white, and yellow machine embroidery; with “Muster Ges. Gesch.” embroidered into the reverse; measuring 80 mm x 61 mm; mint and unissued condition.