Lot 287 P
Airmail, 1923, Second Issue, 8¢-24¢ Complete, Large Die Proofs on India Paper, each die sunk on card (201x151mm), each with typewritten approval date and signed by Postmaster General Harry S. New on card below proofs, with additional initials including the Superintendent of the Division of Stamps and Chief of the Philatelic Agency of the Post Office Department, Michael L. Eidsness, Jr., each with blue control number on reverse; 24¢ slightly oxidized, Extremely Fine.Scott No. C4P1-C6P1 $14,750.
THE UNIQUE "GLOVER" SET OF LARGE DIE PROOFS OF THE 1923 SECOND AIRMAIL ISSUE - SIGNED BY BOTH THE POSTMASTER GENERAL HARRY S. NEW AND CHIEF OF THE PHILATELIC AGENCY OF THE POST OFFICE DEPARTMENT, MICHAEL L. EIDSNESS, JR.
According to the "American Air Mail Catalogue" only five large die proofs were produced. This was the Second Assistant Postmaster General Warren Irving Glover's set and is the only one signed by both the Postmaster General and the Chief of the Philatelic Agency of the Post Office Department.
Lot
288 
Airmail, 1923, 16¢ dark blue, o.g., never hinged, choice centering amid uncommonly large margins, bold color, an Extremely Fine to Superb jumbo; with 2005 P.S.E. certificate Graded (XF-Superb 95 Jumbo, SMQ $700).Scott No. C5 $120.
Lot
289
Airmail, 1923, 24¢ carmine, o.g., never hinged, exceptional centering amid oversized margins, strong vibrant color, an Extremely Fine to Superb jumbo; with 2023 P.S.E. certificate Graded (XF-Superb 95 Jumbo, SMQ $675).Scott No. C6 $130.
Lot
290
Airmail, 1930, 65¢ Graf Zeppelin, o.g., never hinged, large oversized margins and precise centering, rich vivid color on bright paper, an Extremely Fine to Superb jumbo; with 2019 P.S.E. certificate Graded (XF-Superb 95 Jumbo, SMQ $1,100).Scott No. C13 $250.
Lot 291 o
Airmail, 1930, 65¢ Graf Zeppelin, exceedingly well centered with deep rich color, neat "Varick St. Sta. N.Y. Apr. 30 12:30PM 1930" town and part of purple cachet at left, Superb, with only one other example grading higher (a 100); with 2019 P.S.E. certificate (Graded Superb 98, SMQ $1,100).Scott No. C13 $160.
Lot 292 o
Airmail, 1930, $1.30 Graf Zeppelin, exceptional centering amid beautifully balanced margins, deep color, Varick St. Sta. N.Y. slogan machine cancel, a Superb gem, with only two examples grading higher; with 2009 P.S.E. & 2021 P.F. certificates, both Graded (Superb 98, SMQ $2,000).Scott No. C14 $360.
Lot 293 o
Airmail, 1930, $2.60 Graf Zeppelin, neat slogan machine cancel, precision centering amid evenly balanced margins, rich vibrant color, Superb; with 2020 P.S.E. certificate Graded (Superb 98, SMQ $2,750).Scott No. C15 $550.
AN OUTSTANDING USED GEM SINGLE WITH ONLY TWO GRADED HIGHER (100).
Lot
294 
Airmail, 1937, 50¢ China Clipper, wide margin top margin plate no. "21625" block of six, o.g., never hinged, exceptional overall centering, deep bold color, Extremely Fine.Scott No. C22 Estimate $2,000 - 3,000.
AN EXTREMELY RARE MINT NEVER HINGED EXAMPLE OF THE 50¢ CLIPPER ISSUE IN THE WIDE TOP PLATE BLOCK FORMAT.
This wide margin plate block is one of the rarest airmail issue plate blocks with only a handful known. Scott catalog notes for this issue - "wide full selvage top margin plate blocks of No. C22 are extremely scarce and sell for $3,000.00 or more" (versus $85.00 price for regular plate block).
Lot
295
Airmail, 1988, 36¢ Sikorsky, red, dark blue & black (engraved) omitted, bottom left corner margin block of 4 with "Zip Code" imprint, o.g., never hinged, Superb, an extremely rare multiple - with Datz recording only 20 example in all; with 2017 P.S.E. certificate Graded (Superb 98).Scott No. C119a $3,600 for singles.