"Mill" - Typewriter for Navy Radiomen copying CW (Morse Code) manually

A "mill" is distinguished from normal typewriters by having all caps (9 point, sans serif) and having numbers "1" and "slashed 0" on the top row.
Note: Portable models were typically used elsewhere than in the radio room, but still have the same key/type layout.

mill-1942.jpg (25115 bytes)   mill-type.jpg (32182 bytes)

Thanks to David Ring N1EA, you can download a mill font for Windows computers 
from https://www.qsl.net/n1ea/mill_02.ttf 
Save the file and double-click on it to install.

Copying CW before the mill - USS Walke in 1914
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Radioman at LOP (Local Operating Position) with older style mill
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Underwood mill aboard USS Massachusetts
p1010049.jpg (61009 bytes)
1966 - a more modern mill aboard USS Robert E Lee
robertelee-01.jpg (123199 bytes)
Another modern version aboard USS Liberty
liberty-halman-RM2.jpg (99271 bytes)
Yet another version aboard USS Rowan in 1969
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1959 Aboard USS Estes
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1961 Aboard USS Estes
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Underwood Model 5 mill
mill-underwood5-1705-01.jpg (265233 bytes)
mill-underwood5-1705-02.jpg (333780 bytes) mill-underwood5-1705-05.jpg (279851 bytes) mill-underwood5-1705-06.jpg (236252 bytes)
1942 Underwood Model S mill
DSC00998.JPG (4456432 bytes)
DSC00999.JPG (4321341 bytes) --
Underwood Universal portable mill
mill-under-1209-01.jpg (39758 bytes)
mill-under-1209-03.jpg (48202 bytes) mill-under-1209-02.jpg (78071 bytes) Another Photo of Underwood Universal mill
mill-under-1210-01.JPG (218381 bytes) mill-under-1312-01.JPG (491611 bytes) Radioman School - 1943-44
training-bos-1943.jpg (150436 bytes)
mill-under-1210-06.JPG (175874 bytes)
mill-under-1210-03.JPG (250295 bytes) mill-under-1210-02.JPG (212041 bytes) mill-under-1210-05.JPG (120300 bytes) mill-under-1210-04.JPG (314541 bytes)
mill-under-1312-03.JPG (597022 bytes) mill-under-1312-04.JPG (538065 bytes) mill-underwood-1601-01.jpg (443116 bytes) mill-underwood-1601-02.jpg (359836 bytes)
Royal model KMM mill

mill-royal-1504-01.JPG (222495 bytes)

mill-royal-1504-02.JPG (212592 bytes) mill-royal-1504-03.JPG (279803 bytes) mill-royal-1504-04.JPG (135568 bytes)
1940's model Royal Arrow portable mill
mill-royal-01.JPG (452441 bytes)
mill-royal-04.JPG (601355 bytes) mill-royal-02.JPG (426264 bytes) mill-royal-03.JPG (436170 bytes)
mill-royal-05.JPG (444730 bytes) mill-royal-06.JPG (413222 bytes) mill-arrow-1401-01.jpg (353437 bytes) mill-arrow-1401-02.jpg (387686 bytes)
mill-royal-1302-01.JPG (517044 bytes) mill-royal-1302-02.JPG (424994 bytes) mill-royal-1704-01.jpg (241062 bytes) mill-royal-1704-02.jpg (301001 bytes)
mill-royal-1942-1310-01.JPG (390636 bytes) mill-royal-1942-1310-02.JPG (370409 bytes) mill-royal-1942-1310-03.JPG (363455 bytes) mill-royal-1942-1310-04.JPG (187616 bytes)
1940's Corona Standard portable mill

mill-corona-1604-01.jpg (160226 bytes)

mill-corona-1604-02.jpg (74192 bytes) mill-corona-1604-03.jpg (174248 bytes) mill-corona-1604-04.jpg (157577 bytes)
Remington 5 portable mill
remington-5-1604-01.jpg (217681 bytes)
remington-5-1604-04.jpg (322347 bytes) "USN" on case
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mill-remington-1605-01.jpg (247592 bytes)
R.C. Allen mill
mill-allen-1611-01.jpg (173166 bytes)
mill-allen-1611-02.jpg (194609 bytes) mill-allen-1611-03.jpg (308023 bytes) mill-allen-1611-04.jpg (167681 bytes)

More photos of mills


RIP-5 Underwood "Code Machine" - Used by intercept operators to copy Japanese Morse code - it prints Kana characters - More info, More info, More info, NCM video

Browne, Jay R., Editor. "RIP 5, The Underwood Code Machine". Naval Cryptologic Veterans Association Special Publication. 2005. 110 pp. 
From NSA article on Linguists - Katakana was usually used for sending telegrams and for Morse transmissions from ships or military units -- and was what American intercept operators meant when they said they "copied kana" or "copied kana code."

In order to provide standard representation of Japanese in intercept, OP-20-G's Laurance Safford bought and modified typewriters for intercept operators. This machine came to be called the RIP-5 and eventually was shared with the Army's SIS.

An OP-20-G history described the RIP-5 as "the kana character represented by a dot-dash combination which, in International Morse, represented a Roman letter, was printed by the type block actuated by the key, which on a normal typewriter, caused that letter to print." That is, when a Japanese clerk transmitted "-," the U.S. operator recognized it as Roman "B" and struck "B" on the RIP-5; the typewriter, however, printed out the kana character [HA] represented by "-" in Japanese.
Radio Intercept Instructions - Japanese Morse, Abbreviations, Military Terms Glossary
from Military Intelligence Service Language School, Camp Savage MN, circa 1943
 - b/w scan pdf,   grayscale scan pdf
Photos from eBay 2018 
RIP-5 based on Underwood "Model 5"
mill-kana-1806-01.jpg (506197 bytes)
mill-kana-1806-02.jpg (327120 bytes) mill-kana-1806-03.jpg (333366 bytes) mill-kana-1806-04.jpg (181204 bytes)
mill-kana-1806-05.jpg (401914 bytes) mill-kana-1806-06.jpg (357805 bytes) mill-kana-1806-07.jpg (259229 bytes) mill-kana-1806-08.jpg (506111 bytes)
Photos from National Cryptographic Museum archives
RIP-5 based on Underwood "Model 5"
rip5-ncm02-01.jpg (561512 bytes)
rip5-ncm02-02.jpg (1043502 bytes) rip5-ncm02-03.jpg (1068380 bytes) rip5-ncm02-04.jpg (914720 bytes)
rip5-ncm02-05.jpg (1043294 bytes) rip5-ncm02-06.jpg (1032472 bytes) rip5-ncm02-08.jpg (917880 bytes) rip5-ncm02-09.jpg (720587 bytes)
RIP-5 based on Underwood "Master"
rip5-ncm03-01.jpg (707092 bytes)
rip5-ncm03-02.jpg (783162 bytes) rip5-ncm03-03.jpg (963052 bytes) rip5-ncm03-04.jpg (621325 bytes)
RIP-5 based on Underwood "Model 5"
rip5-ncm04-01.jpg (678913 bytes)
rip5-ncm04-02.jpg (893933 bytes) RIP-5 based on Underwood "Universal Portable" for shipboard Radio Intercept Unit use
rip5-ncm01-02.jpg (404661 bytes)
rip5-ncm01-01.jpg (623526 bytes)