KOMBI Camera and Graphoscope by KEMPER,  USA 1892-

TICKA, HOUGHTON,  UK, 1904-1914
Detective camera, designed like a watch-pocket

CORONET MIDGET,  1934-39,   UK

SIDA,     GERMANY    1930s

UNIVEX  A,  UNIVERSAL,  USA,  1933

MERLIN,  (by United Optical Instruments),   UK,  c1936

UNIVEX AF-5,  UNIVERSAL,  USA  1935-1939

MICRO 16, WHITTAKER, USA C-1947

STYLOPHOT  by  SECAM  (FRANCE)   50's

PETIE,  KUNIK   GERMANY    1950s

MINUTE16  by  UNIVERSAL  (USA)   50's

TYNAR  by  TYNAR co.   (USA)   50's

STEKY II, made in occupied  JAPAN,    1949-

HIT  type   1950'S   (JAPAN)
in that category : many similar cameras with diffrent names exist

TKK,  VestKam,   1949   (made in occupied JAPAN)
Looks like the HIT but heavier and of a better quality

PIXIE,  WHITTAKER,    USA,  1950s

F-21 BUTTON CAMERA, KMZ, USSR, 1950s-1980s

MAMIYA  16  SUPER   JAPAN,   c1951

KIEV VEGA   50'S   (RUSSIA)

JPS  cigarette-pack-camera   (KIEV)   UKRAINA
Click on the pic. for full details

MEC-16    GERMANY,   c1958

KOWA  RAMERA    JAPAN,   c1959
Bell submini camera built-in a 6 transistor radio

Two HOMER subminis:
HOMER No 1, KAMBAYASHI,  1960   (JAPAN)
HOMER 16,  1960   (JAPAN)

TOP submini camera,  JAPAN,   1960s

MINOLTA  16  model P   JAPAN,   1960s
"introduction" in design to the later KODAK Pocket Instamatic cameras (1970s)

MAGNACAM WristMatic camera,  USA-  1980s

CAM WATCH M1, CHADT, GERMANY, 1990s