<s>
Petie	B-Algorithm
cameras	O
were	O
subminiature	O
cameras	O
manufactured	O
and	O
distributed	O
by	O
Walter	O
Kunik	O
of	O
Frankfurt	O
am	O
Main	O
,	O
West	O
Germany	O
,	O
during	O
the	O
1950s	O
and	O
1960s	O
.	O
</s>
<s>
The	O
Petie	B-Algorithm
had	O
a	O
20mm	O
(	O
f9.0	O
)	O
fixed-focus	O
lens	O
and	O
a	O
shutter	O
speed	O
set	O
at	O
1/50	O
sec	O
.	O
</s>
