How old was Erno Koštál in Behind the birthstone?

Josef RovenskýJosef Rovenský was 36 in Behind the birthstone

Birthday: Tue, Apr 17 1894 –
Fri, Nov 05 1937

Jan W. SpeergerJan W. Speerger was 34 in Behind the birthstone

Birthday: Wed, Apr 29 1896 –
Sun, Jun 25 1950

Anita JanováAnita Janová was 22 in Behind the birthstone

Birthday: Thu, Dec 19 1907 –
Thu, Apr 24 1975

Ada VelickýAda Velický was 46 in Behind the birthstone

Birthday: Tue, Oct 30 1883 –
Tue, Feb 24 1931

Josef ZezulkaJosef Zezulka was 26 in Behind the birthstone

Birthday: Sun, Apr 24 1904 –
Mon, Jun 17 1974

Václav VíchVáclav Vích was 32 in Behind the birthstone as 'Director of Photography'

Birthday: Wed, Jan 19 1898 –
Wed, Sep 14 1966

Oldřich KmínekOldřich Kmínek was 37 in Behind the birthstone as 'Screenplay, Director'

Birthday: Mon, Dec 05 1892 –
Thu, Sep 23 1948

Jan StallichJan Stallich was 23 in Behind the birthstone as 'Director of Photography'

Birthday: Tue, Mar 19 1907 –
Thu, Jun 14 1973

Erno KoštálErno Koštál was 40 in Behind the birthstone as 'Original Music Composer'

Birthday: Tue, Nov 26 1889 –
Sat, Jan 26 1957

I. HumhalováI. Humhalová was >> in Behind the birthstone as 'Story'

Birthday: Unknown Birthday