How old was Hans H. Zerlett in Unsterblicher Valentin?

Erich EngelsErich Engels was 68 in Unsterblicher Valentin as 'Director'

Birthday: Thu, May 23 1889 –
Sun, Apr 25 1971

Karel LamačKarel Lamač would have been no older than 55 in Unsterblicher Valentin as 'Director'

Birthday: Wed, Jan 27 1897 –
Sat, Aug 02 1952

Joe StöckelJoe Stöckel was 63 in Unsterblicher Valentin as 'Director'

Birthday: Thu, Sep 27 1894 –
Sun, Jun 14 1959

Hans H. ZerlettHans H. Zerlett would have been no older than 56 in Unsterblicher Valentin as 'Director'

Birthday: Mon, Oct 17 1892 –
Wed, Jul 06 1949