Hi Arcana, first of all: welcome to the ledge.
Then, I'm very curious where you got the information as to the dates of the Helsinki shows. They have been wandering around for a long time with the "false" dates. Secondly, Dinky Dawsons tourbook reveals that there was a show on 1970-04-03 in Helsinki. How are you so sure the mentioned recording is not from that show.
No offense, just being curious enough to want to get history straight (which is rather difficult).
Cheers
