Take a look here:
http://www.tague.at/pistolen/en_index.htm?/pistolen/pages/en_cz27.htmHere is some additional information:
CZ 27 Serial Number Series
(Numbers are Approximate)
Up to 1938 ? serial # 0 ? 15,000 These are preGerman occupation
1939, 40 & early 41 serial # 15,001-20,500 is considered start of all production going to the German military
1941 ? 42,000 CZ 27?s produced
1942 ? 100,000 produced
1943 ? 200,000 produced
1944?77,000 produced
1943 ? 23,000 produced, This is up to the point when the allies liberated the factory
Serial # 473,000 is the last pistol produced under occupation.
The above was taken from a post on the Surplusrifleforum.com
PB