Harry C. Ioor GP Cachets
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U.S. First Day Cover Cachet Display Catalog:
Cachetmaker: Dr. Harry C. Ioor General Purpose Cachets
Part of the U.S. First Day Cover Cachet Display Catalog
by Douglas H. Henkle, AFDCS LM #137,
henkle@pobox.com
(last updated .12-11-2025)
FDC Publishing Co. Planty Catalog Numbers (1901-1939)
FDC Publishing Co. Mellone Catalog Numbers (1940-1969)
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This page displays First Day Covers with General Purpose (GP) cachets created by Dr. Harry C. Ioor (1882-1940) of Indianapolis, IN. All cachets I have seen are displayed in color. The
"Photo Cachet Catalog: Harry Ioor"
by Dr. M. Douglas Parks (1932-2018) is in black and white. Except as noted by "{A}" (from my personal collection), and (RHL) from Robert H. Lucier, all other displayed covers were found on the Web.
What's New on this page
Wanted: a 300 bpi / 600 pixel wide (or greater) .jpg scan of any unlisted cachet, and ALSO any cachet marked ***
Email it to: henkle@pobox.com
Subject for this page: Doug Henkle unlisted Harry Ioor General Purpose cachet
(an email with any other subject or with any other graphical format will be ignored IF it has an attachment)
U.S. Scott #nnn =
U.S. Scott Catalog number.
mm-dd-yyyy = First Day of Issue
General Purpose (GP) cachet pages:
Eagles
-- 1DC and 1DI
-- FDC
-- FDI
-- FDOI
Identifier of all the GP's above on one page
General Purpose "Border" Cachets
Ioor General Purpose (GP) "Border" Cachets
Ioor General Purpose (GP) cachets (this page)
Wanted: Cover Scans:
#OR-GP1 -- #OR-GP11 -- #OR-GP16 -- #OR-GP23 -- #OR-GP27
Wanted: FDC Scans:
#OR-GP8a
-- #OR-GP12
-- #OR-GP13
-- #OR-GP15
-- #OR-GP17
-- #OR-GP18
-- #OR-GP19
-- #OR-GP20
-- #OR-GP21
-- #OR-GP24
-- #OR-GP27
-- #OR-GP28
Thumbnails Menu:
Catalog numbers assigned by Dr. M. Douglas Parks, e.g. "#OR-GP1"
GP1
GP2
GP3
GP4
GP5
GP6
GP7
GP8
GP9
GP10
GP11
GP12
GP13
GP14
GP15
GP16
GP17
GP18
GP19
GP20
GP21
GP22
GP23
GP24
GP25
GP26
GP27
GP28
GP29
GP30
- #OR-GP1 -- Dr. Harry C. Ioor General Purpose, black & red
#U524-1, 1-01-1932
I cannot find a cover without the dates and the text at the bottom shown as #U524-1.
#OR-GP1a -- Dr. Harry C. Ioor General Purpose, black & green
#706-707-32bb.1, 1-01-1932 (on Ioor OR-B2)
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- #OR-GP2 -- Dr. Harry C. Ioor General Purpose
#722-GP5, 10-12-1932
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- #OR-GP3 -- Dr. Harry C. Ioor General Purpose,
large
#C19-21, 6-30-1934
#OR-GP3a -- Dr. Harry C. Ioor General Purpose,
small
#CE1-15, 8-30-1934
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- #OR-GP4 -- Dr. Harry C. Ioor General Purpose
#C19-GP1, 6-30-1934
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- #OR-GP5 -- Dr. Harry C. Ioor General Purpose
#C19, 6-30-1934
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- #OR-GP6 -- Dr. Harry C. Ioor General Purpose,
red plane
#C22-33, 2-15-1937
#OR-GP6.1-NIP -- Dr. Harry C. Ioor General Purpose,
red plane without the underlined "VIA SPECIAL DELIVERY" printing
#C22-33a-NIP, 2-15-1937
#OR-GP6a -- Dr. Harry C. Ioor General Purpose,
green plane
#C21-33, 2-15-1937
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- #OR-GP7 -- Dr. Harry C. Ioor General Purpose
#E17, 10-30-1944
-- #CE2-2, 2-10-1936
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- #OR-GP8 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotics: S2#10944, p. 393
#OR-GP8a -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotics: S2#10775, p. 390
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- #OR-GP9 -- Dr. Harry C. Ioor General Purpose
#755-2a, 3-15-1935
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- #OR-GP10 -- Dr. Harry C. Ioor General Purpose
#857-GP22, 9-25-1939 [2nd day cancel] (RHL)
#OR-GP10a -- Dr. Harry C. Ioor General Purpose
#803-851-1, XIV:10
#OR-GP10b -- Dr. Harry C. Ioor General Purpose
#815ee, 9-25-1941
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- #OR-GP11 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
I cannot find a cover with this design, which is the same as OR-GP12 (below) "without all the text and stars".
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- #OR-GP12 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotics: S2#3033, p. 207 -- S2#2656, p. 197
-- Lawrence Sherman
identified them as by the Mission Stamp Club, not Ioor
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- #OR-GP13 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotic: S2#10772 p. 390/397, with just the same flag and no text was identified by
Lawrence Sherman as by Wesley Smith, not Ioor.
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- #OR-GP14 -- Dr. Harry C. Ioor General Purpose
#717, 4-22-1932
-- #724-GP14, 10-24-1932
-- #734-GP9a, 10-13-1933
-- #788, 3-23-1937
Patriotic: S2#10772 p. 390/397, with just the same flag and no text was identified by
Lawrence Sherman as by Wesley Smith, not Ioor.
OR-GP14 -- OR-GP14a -- OR-GP14b -- OR-GP14c
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- #OR-GP15 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotic: S2#10772 p. 390/397, with just the same flag and no text was identified by
Lawrence Sherman as by Wesley Smith, not Ioor.
#OR-GP15a -- Dr. Harry C. Ioor General Purpose
#723-GP17b, 8-18-1932
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- #OR-GP16 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
I cannot find a cover with this design.
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- #OR-GP17 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotic: S1#9440 p. 316/321 and S2#10891, p. 392/397, per
Lawrence Sherman
#OR-GP17a -- Dr. Harry C. Ioor General Purpose --- (eBay) / (filler Alan Warren)
#806b, 1-27-1939
-- unused blank
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- #OR-GP18 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Event, 5-30-1932
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- #OR-GP19 -- Dr. Harry C. Ioor General Purpose
#893-851-GP32, 10-28-1940 XIV:7
Patriotic: S2#11033 p. 394
WW II, 9-23-1943, 1-08-1944
-- unused blank
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- #OR-GP20 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotic: S2#10965 p. 393
WW II, 7-30-1945
-- unused blank
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- #OR-GP21 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotic: S2#10804 p. 390, 11-04-1943, 8-06-1944
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- #OR-GP22 -- Dr. Harry C. Ioor General Purpose
#720b-NIP, 7-25-1932
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- #OR-GP23 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
I cannot find a cover with this design.
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- #OR-GP24 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotic: S2#10772 p. 390/397
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- #OR-GP25 -- Dr. Harry C. Ioor General Purpose
FDC, See: General Purpose GP#Eagle3
See: General Purpose GP#Eagle3 for all varieties of this cachet I know about.
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- #OR-GP26 -- Dr. Harry C. Ioor General Purpose
#726-GP15, 2-12-1933
-- #804EE, 9-08-1941
-- #809EE, 10-28-1941
-- #808/822, 10-27-1938
Patriotic: S2#10772 p. 390/397, with just the same flag and no text was identified by
Lawrence Sherman as by Wesley Smith, not Ioor.
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- #OR-GP27 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
I cannot find a cover with this design, without the bar as shown on #OR-GP14.
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- #OR-GP28 -- Dr. Harry C. Ioor General Purpose
FDC, unknown
Patriotic: S2#11008, p. 394
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Other Ioor General Purpose cachets not in the Catalog
- #OR-GP29 -- Dr. Harry C. Ioor General Purpose
#724-GP4, 10-24-1932
Patriotic: S2#8912, p. 344

- #OR-GP30 -- "First Day Cover" General Purpose
FDC, unknown
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Ioor Patriotics:
A partial list of Ioor Patriotic cachets listed by
Lawrence Sherman, 2nd ed..
- S2#680, p. 148 ("Armistice Day [Doughboy]") no scan
- S2#681, p. 148 ("Armistice Day [Gen. Foch]") no scan
- S2#682, p. 148 ("Armistice Day [Gen. Pershing]") no scan
- S2#990, p. 157

- S2#2656, p. 197 -- #OR-GP12
- S2#2727, p. 202

- S2#3033, p. 207 -- #OR-GP12
- S2#4743, p. 248

- S2#8912, p. 344 -- #OR-GP29
- S2#10772, p. 390/397
-- #OR-GP13
-- #OR-GP14
-- #OR-GP15
-- #OR-GP26 -- ^^Flag, U.S., billowing, with 2 tassels
- S2#10774, p. 390 -- ^^Flag, U.S., being raised, 1 figure raising flag, 2 saluting

- S2#10775, p. 390 -- #OR-GP8a -- ^^Flag, U.S., billowing in front of "Spirit of 76"
- S2#10776, p. 390 -- ^Flag, U.S., billowing in front of staff
- S2#10804, p. 390 -- #OR-GP21
- S2#10891, p. 392/397 -- #OR-GP17
- S2#10940, p. 393

- S2#10944, p. 393 -- #OR-GP8
- S2#10965, p. 393 -- #OR-GP20
- S2#11008, p. 394 -- #OR-GP28
- S2#11033, p. 394 -- #OR-GP19
- NIS2#210a, p. 140 -- Abraham Lincoln / 1809 - 1865 / From / Log Cabin / to / White House
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What's New on this page -- changes since 12-03-2025:
12-11-2025
-- Added:
#OR-GP10 cover scan
#Contact
URL: https://folklib.net/fdc/makers/gp-ioor.shtml
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Page created by Douglas H. Henkle (Contact):
henkle@pobox.com