Item 

No. 

1 

2 

3 

4 

5. 

6 

7 

8 

l S'--- Ni>~ ~ ') 

Nomenclature 

er -:{&} Des 1gna ti on,. 

Converter M-134-T-l 

Converter M-134-T-2 

Converter M-134 

(SIGHIC) 

Converter M-134-A 

(SIGMYC) 

Keying Unit M-229 

.Keying Unit M-229 

(SIGGOO) 

Converter M-134-C 

(SIGABA) 

Converter M-161-C 

(~~R- N~~ Total -

Quantityill 

Procured 

1 

12 

56 

1 

75 

3,330 

2 

·.Ji::::.C::.t·.l. \ 

{~ .. ~(~72~b N~.D) 

· Prod. Agency 

Uni t-La.l or -.., Cost""llliilli7 Manufacturer 

Technical 19). Literature 

Patent 

Status 

Unknown ,(Si@:~\ ·raee~. 

~ 

Serpe Exhibit Ko.t U.S.Patent 

#2,028:~12 

~ . ... !!..• issued 28Jan 36 ···· ... , 

Unknown ~..si.·eopPS -ith·,~~~ See ;~~~-- . - :c4 

LMMI·• #l. ~. ·. -~ 2.. ... -... ... .. . .. .... .. e.o_~ "If.;... •, 

$2,135. k_~ii~ee le. Exhibiti ~DS.· GT.S.Patent··~ .... ~~-·~·····"· 'l'i&Pn&ft P11ods.~ ., , Apl)licatio.~.. ya). IRe, Be-H~-1-le, ,, #682,096~n '• ~,33 

--M-nJ-....... secrecy status 1J . . ······· ........... ____ .... 

$2,400 "A;.. .:;JliZ. ... Exhibits I\·. • 

$2,955 " .~ 

(S:!:gnal- eor:ps l:ab1t·· 

$500 •-" ""' (Wallace-~ 'l'!e1•rmn 

"- ~etitte~&r Ine • Ex hi bit! ·No-'. 

$1,567 .......... 3 ~elet,-pe --&o-rps. Exhibit·~-.:·'. 

Gfiicago; "111·· 

Army: U.S. ~ _1.: Pat. Applies- ··~~~) tion No. 70,412A ~ in secrecy status 

Nav1: (Some have 

been filed; 

details not 

known) °'· 

$12,132 Exhibit Covered (tl'T . under Item 7 

.:-.~-<._~:::---~irlH~~...A!itVf== .... ·~-· ...... >-.....llone-......... . · . ........___ .. ~-·,:::{1J.·~ · · 

eclassified and approved for release by NSA on 09-12-2013 pursuant to E.O. 

3526 

··· ...... 
Nomenclature 

Item or 

Ro. Designation~) 

18 

1,.. 

1$'" 

Sfecial Cipher Unit 

SIGAMUO) 

Converter M-228 

Conve?"ter M-228 

Converter M-294 

Converter M-294 

(SIGNIN) 

Converter M-325 

Converter M-325 

(SIGFOY) 

Converter M-409 

Roto~ 

R·~ u. . A f :f~ ·· l- :. 

!_, 1-..' ia. •• 

t. fO':' ' 

" 

•I 

REF ID:A27372B 

Total Prod. Agency 

or Technical (4) Manufacturer Literature Que.n~ity Unit(~) !rocured(2) Cost ~ 

Patent ___...., 

Status ~ 

1,375 

2 

3,220 

1 

500 

2 

12,000 

7 

$210 ~-· .... ~3 jp'latj'pe Copp.. Fxhi bi t5 1\.-:.. ,,.1; h~ "1) 9-9) 

1-

$6,417 .50 ~'f_!li 801pa None 

J.al9r. 

$526·.Af.O ·feiei;"~ -Gel."jl. Exhi bl t 

$20,000 . ., 3 ... None 

$2300 Exhibit 

None 

$150 ~ .... ~ Exh::.blt 

$31,~~ 3 hC°'..O. ., . 

~>tiu~-v+ 

--~ 

\' •• ~-~ I 

J ... : ... See under ) .. :·--- (i"R) . ····. ~-- r······~-~em lf_.. . . ~ i·~~ 

·1 /U .;·~;;t. Appl1~(~)---· \..: cation Ne~--··· ··· -' 

i 443 ,320A1n ( '~ecrecy status ·:. 

Cryptographic (iS) features 

covered by appli- cation under 

Item 11\. 

Cryptographic 

features covered 

hy appl:I eat!on 

under Item No. 10 

U.S. Pat. Appli- (2)> cation No. • ..

549, 0864 in secrecy ... ) 

status '-~ u /\..,.~ "t~j 

See under Item 1'1-(~l 

' ~ ~-"' ~·7 6~) 
REF ID:A27372B 

Psu~~~C:. 'h,&~~ ~ )c..J-o... 

(A) Long title is given first, followed by short title (when 

one was assigned). 

(!) The total quantity may have been procured under one or 

more contracts. 

(~) Where two or more cont~acts were involved, the unit cost 

is the average of unit costs of the separate contracts. 

( l>) ( 4.tjt'} ,,l.-.,.ctA_) O-u.J).,/~, .,,,.,~~ 

[I') Only such technical literature~as contain information 

~-fl~-~bing the equi:i;ent ~included . 

.-- (jJ Item 1 was purely an experimental model and was never 

put into ser11v_1ce; av!iilable in ASA museum. ~~ ~ ~ ~ ~,l~ b-CJ. )'.Q.<-~J ~ ~~C .J 

(Z) The two machines coMti tuting Item, 2 were p lot models (\ ---1-. • 

for Itew. 3; AlU7l}i la,.ble in"mh.s~um. Cc* ,.~ ~f--.A~ ~""'--~ l:'.rlJ. "'t-V'-'-&:: be- ~- "ff--t1J !)-~ ~~<J °'.-6 1

J ~~t C-O'ry~ ~--ltr.~-;; 

t,,)' These machines were delivered in August 1938 and were 

in service ~lfflt11 superseded by Item 6; then destroyed except 

for one in~museum. f\ 

(4-) These machines incorporated some minor modifications in 

Item 3. Eight machines were purchased from the 'Par Department 

by the State Department. All 56 machines were in service for 

several years. 

(5) This served as pilot model for Item 6; available in ASA 

museum. 

(c:tl) Keying Unit M-229 replaced the key-tape transmitter of 

Items 3 and 4 and served as controlling element for stepping 

the rotors. 

1 (-1:-1') This machine ,.... constituted the pt'incipal one used by 

Army and Navy for intra and inter-service high and mediumechelon classified communications. Preliminary models and ~'-

pre-production m~d~ls developed by Teletype CorJ(_; ~°"~ C-u.. l'KM..."'_1.,. 

~~.~--.A~ w~ ~ ~~~.JL..o..~~~ \~ 

~ (~) These were experimental models constructed in an attempt '\ 

to produce a~~~aller and lighter version of Converter M-134-C; 

available in museum. 

"' , ) Th~e were.,,.experime~l model~ ... -~mbodying modifica~i1ns _,., 

i Con~e'r yir 1-3~.-.C . s,sv. 13: s )o mais.e-"'"iheh lat ter~P-t. o. g~4ph ~ ly 

e ui v e Int~ Ne.. apd" Item l'fo. L" ; £\,yS:ilab ,·e 

1 seunl~ · · · r_/ \,,,.r ~..,. . 
REF ID:A27372B 
REF ID:A27372B 

ro(~ Jffiiis item was designed for emergency use with Item 7 

se 9r ph;r~al compromis~.- of Efonvert~,·-11;1-134-C_~_...e-μrrenJ., 

s a,tid k~.Y-lists, unt~J..··1'few rotors tld k~y-l:t,Bt's c¢>u1a· {" su~d._/,...'Although p~uced in qu ity and 1,.S'sued, U-' was. 

never us'eti since t~ergency ti r occurre% .u:i "' 'ln 

fl (~ Th~se Special Cipher Units{;;;: J:;~~!rt;.:'i;_c9~;::; 1 No. 7) utilizable for Combined Communications (with British 

only) as one version of a cryptographic machine designated 

as the CCM (Combined Cipher Machine). 

r0 (-l-61 Thes·e were development models for Item No. 11. 

r) (l1'J These machines were employed for on-line and off-line . teletype and radioteletype communications; rn..o.c1.......:.....u:i o..tJ-t.i.~ "._ASl\. ........ uu ..... 

/~(~) Development model, follow~drby ~n ~dditional development model before standardizingj '2..\m.a.;.:4lk)C.1 '-"· ASf.; -..... . .v..A.C..•.l.,-., ...... 

l3" (~) These were delivered too late to be employed during 

actual hostilities; now in storage. A few were used in 

service tests. · 

14'-(-201 Development model, followed by an additional development 

model before standardizing •. ~~ ~- ASA ~J:i...u.. .... ~ .• 

J 

\$ (a) The State Department purchSsed 1000 of these machines, 

put a number of them into service for a short period. The 

Army used them briefly in service tests but the machine was 

never used extensively because of poor performance. 

(I~)