Posted by Ron Smith on Wednesday, August 24, 2011 @ 10:13 AM:
D-KHEK (51001) was built in spring 1971 and under test in the summer of that year (My brother and I were working for Sportavia at the time during University vacations).
I find from http://www.apinalauma.fi/~andy/Seko/Suomen%20Tuuliat.pdf that it is now OH-953.
The site referenced contains a list of Finnish Fourniers and a series of lovely photographs of a nuumber of them. It is well worth a link from this site.