C23-48 - 6c EAGLE/SHIELD BLK/4, 1938 PLIMPTON 1ST DAY & NAMW COVER

C23-48 - 6c EAGLE/SHIELD BLK/4 AIRMAIL, FIRST DAY OF ISSUE / NAT'L AIR MAIL WEEK PLIMPTON COVER 5/14/1938, DAYTON, OHIO, BACK OPEN, FLAP GLUED TO INSIDE, NO BACKSTAMP, VANILLA COLOR ENVELOPE MFD. BY PLIMPTON.

FINE+CONDITION, VERY LIGHT WEAR, BEAUTIFUL UNCOMMON COVER FOR A CLASSIC ISSUE.

MEMBER APS/AAMS USING ACID-FREE ARCHIVAL QUALITY SLEEVES TO PROTECT COVERS/CARDS. THANK YOU.