French army postal service free of charge letter of a member of the 22. company / 25. Alpine hunter battalion (B. C. A. ) / army postal service number S (ecteur) P (ostal) 184 from Gliwice to Gamardeles Bains (Dep. Lande), single circle TRESOR ET POSTES * 18 -8 21 * 184 * (OS handbook number FP3 d), vignette with view of the lot from the Wilhelmstrasse in Gliwice at back, good condition