On the Radio Reference forums there was a recent discussion about CONELRAD markings on radios. These markings were "required" from 1953 to 1963, they were near universal on BC radios of the time period, but it seems some general coverage communications radios had them and some did not. This is a quick look through my collection at general coverage communications radios from around the right time period (I targeted 1952 to 1968, and radios overlapping those years), and their CONELRAD marking status.
Model	CONELRAD Marked Yes	CONELRAD Marked No	Misc info
Collins
51-J3		X
51-J4		X
51-S1		X
Lafeyette
HE-10		X
HE-30		X
HE-60	X
HE-80	X
HA-226		X
HA-230		X
KT-320		X
Hallicrafters
5R10		X
5R100A	X
CR-3000		X
S-38C		X
S-38D	X
S-38E	X
S-40B		X
SX-62		X
SX-62A		X
SX-71		X
S-72		X
SX-73		X
S-76		X
S-85		X
S-96	X
SX-99		X
SX-100	X
S-103	X	X	2 in my collection, one marked one not
S-107	X
S-108		X
SX-110		X
S-118		X	Mine is not marked, but I have seen pictures of this model with CONELRAD markings
S-119	X
S-120	X
S-120A		X
SX-122		X
SX-129		X
SX-130		X
TW-600	X
TW-1000		X
TW-1000A	X
TW-2000	X
WR-600		X
WR-1500	X
Hammarlund
HQ-100	X
HQ-100A	X
HQ-105TR	X
HQ-110	X
HQ-129X	X	X	Neither currently in my collection are so marked, but I have seen one in the past that was
HQ-140-X		X
HQ-145X	X
HQ-150		X
HQ-180A	X
HQ-200	X
SP-600		X
Heathkit
GC-1		X
GC-1A	X	X	2 in my collection, one marked one not
GR-54		X
GR-91	X
National
NC-57		X
NC-60	X
NC-88	X
NC-98	X
NC-109	X
NC-121		X
NC-125		X
NC-173		X
NC-183		X
NC-188	X
NC-190	X