A recent video posted on Facebook suggesting it was in 1953 is clearly taken at an ISDT which after cross referencing the entry list after a suggestion on our Facebook page confirmed it most likely to be 1963. Whilst I have been unable to identify a copy anywhere on YouTube to share it can be seen on our Facebook page.
The video would appear to have originated as a newsreel from Polska Kronika Filmowa. If anyone can locate this archive please let me know. In the absence of a postable copy of the video. Here are some stills from the online video. Not as good a quality as I would like but as images from this event are scarce they are useful.
Photo – #15 Alfred Michel FDR 50cc Kreidler Gold Medal 4th in Class ISDT 1963
Photo – #18 Leo Holy FDR 50cc Zündapp Silver Medal 6th in class ISDT 1963
Photo – #31 Jaroslav Rejman Czechoslovakia 125cc CZ Gold Medal 9th in class ISDT 1963
Photo – #67 Wolfgang Seuffert FDR 100cc Hercules retired day 5 ISDT 1963
Photo – #86 Werner Salewsky DDR 250cc MZ Gold Medal Class winner ISDT 1963
Photo – #264 František Höffer Czechoslovakia 500cc Jawa Silver medal ISDT 1963
Photo – #293 Arthur Lampkin GBR 500cc BSA Silver medal ISDT 1963
Speed Track Tales 
I have a bunch of photos from when my father attended the ISDTs in 1976 and 1977, and would like to post them. Does anyone have the link to the ISDT online forum that shows the timeline in photos?