Letter on front and reverse dated 19.5.17. Admin stamp from Bayer. Landst. Inf. Batl. Landshut I.B.7. - 2.Masch.Gew.Komp. and postage cancelled a day later on 20.5.17.
The shoe maker would be just the man to repair a helmet, restitching a visor, repairing a chin strap, even filling and redrilling holes fir the Wappen. They would have the tread and needles, and the skill.
Best
Gus