No sn data.
No serial number data published.
A CZ 27 with a 171022 serial # was probably made around 1940.
betweem 1941 and 1945
Can't be answered without knowing who made it.
www.gunboards.com
Between 1938-1944.
Who made it?
Serial number data not available
Impossible to answer without the serial number.
1943
It was made in 1971.
AFAIK, Colt never made a single shot pistol