For a period of time even after the war, Korea used J8 as the following map exactly says.
Fortunately enough, US-CQ — May 1948 p.54 — gives us a description of the switch-over date to HL1 as "Feb. 15, 1948."
Call book:
1947 1947
fall winter
----- ----- -----------------------------------------
J8AAA HL1AA S. Guy Blencoe, APO 235
J8AAB HL1AB Ollie J. Allen, APO 234 unit 2
J8AAC H. B. Whitehouse, APO 235 Unit 2
HL1AC T. J. Speer, APO 235-2
J8AAD HL1AD D. C. Gaumer, APO 7
J8AAE J. E. Van Beever, APO 235
HL1AE J. R. Tomes, APO 712
J8AAF Irving Mentcher, APO 712
J8AAG HL1AG N. K. Maxwell, APO 6 unit 1
J9AAH HL1AH W. E. Rubin, APO 7
J8AAI W. W. Burt, APO 235
J8AAJ HL1AJ C. A. Stanley, APO 235 unit 2
HL1AK Jack Hecht, APO 6
J8AAL F. H. Finney Jr., APO 712
J8AAM HL1AM L. S. Gardner, APO 235
HL1AN E. A. Parrish, APO 59
HL1AO M. W. Neill, APO 235
HL1AP P. S. Huston, APO 235
HL1AQ R. M. Morris, APO 7
HL1AR W. C. Kidd, APO 901
HL1AS N. L. Hills, APO 6
HL1AT R. L. Keenan, APO 6-2
HL1AU Kent Hunter, 54th MP Co., APO 901
HL1AV H. J. Redd, Hq. Co. 78th QM Base Depot, APO 59
HL1AW James Openshaw, 111th Sig Sv. Co., APO 235
HL1AX L. E. Gaskell, Hq. Co. XXIV Corps., APO 235
HL1AZ R. W. McNeely, 892nd Ord HAM Co., APO 901
HL1BA A. M. Edwards, Det. 759-1, 139th AACS Sq., APO 712
HL1BB C. R. Dunlap, 76th Sig. Sv. Bn., APO 235
HL1BC H. B. Whitehouse, Dept. of Agri. USAMGIK, APO 235-2
HL1BE E. F. Estrumse, Kimpo Air Base, APO 712
HL1MH M. R. Holt, Hq. 61st Ord. Co., APO 901
HL1WH W. D. Hamlin, Dept. of Comm, USAMGIK, APO 235-2
J8ACS W. R. Plumlee, APO 712
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