Attractive Airmail Envelope franked w/  10$ Helice Air, vert pair 2$00 Lusiadas & $25 TPN, making the 14.25 10-15 g rate postmarked  11-FEV-42 | RESTAURADORES-LISBOA , bkstp octag Aereo | 12 FEV 42 | LISBOA; addr Swiss Legation, transit N.Y.Reg'y Div 3-8, Washington Reg.Div Mar 9, Receipt Mar 11.

Unusual violet PASSED FREE / U.S. Customs Duty / Mall Div. Post Office / WASHINGTON D.C.

includes two artist drawings of markings

 seldom seen use of diplomatic pouch mail

Mundifil 528 (2), 570, CA8