At last I found the time to check back to the lively discussion about the closure of the Skjoldehamn shirt on pearl's livejournal. The discussion already made another webmaster put up more and larger pictures, so it is high time I post my promised photo.
Here you have the neck flap, in colour, with the bead as closure and the broken loop of wool thread that probably served to hold the bead:
If I remember correctly, the bead is made from metal. Here's an even closer closeup, where you can see that it is not a leather thong, but a woolen braid or something similar that holds the bead to the flap.
And finally, in the last picture, you can see the upper left part of the flap, with the braiding running along the edge. The stripes can be seen clearly here.
I took the photos myself; please respect copyright rules when linking to or using them.