CIRCULATED WITH PROCERES Y RIQUEZAS I (GJ 761 pair+1, 763)

POSTAL HISTORY – IMPORTED MATE PAPER (GRENE) – COMPLETE COVER CIRCULATED FROM “BUENOS AIRES-EIV 1° – ARGENTINA – 1 MAY 37 – 18” TO LOKSTEDT HAMBURG WITH RECEIPT CANCELLATION AT THE BACK (7-5-37)