Two more vintage movies on 'Vintage Glider Club in Poland' webpage:

http://www.vgcpoland.pl/

(link to "Films" in the MENU list on the left side):

1. Diamentowy reportaz ((hunting for altitude diamonds from Jelenia Góra, German
'Hirschberg'/Grunau) in the Sudety Mountains);
2. XIV World Gliding Championships Australia 1974

You will probably need a DivX player to see the films.

Tomasz