French army postal service free of charge letter of a member of the 22. Company / 25. Alpine hunter battalion (B. C. A. ) / fieldpost number S (ecteur) P (ostal) 184 to Gamardeles Bains (Dep. Lande), single circle TRESOR ET POSTES * 22 -12 21 * 184 * (OS handbook number FP3 d), fragment of an arrival postmark single circle at back, transport traces