Thanks for your interest, especially those links Milly, it does look similar doesn't it?
I emailed a number of societies, replies said definitely not Oddfellows or Masons, but the Knights Templar thought it looked like the Good Templars, in fact they were fairly sure of it, so I've emailed to Sweden - hoping they can read my English
but as yet not received any reply.
Unfortunately the photograph was amongst an album believed to be of family, and indeed there is resemblance to some of the other pictures enough to believe that he is related, but so far we've been unable to identify who he is, reason for trying to trace the collar.
Mary