I have a lot of Besler 67 negative holders.
1 X #6738 35mm FF (unopened in box) $30
2X #6738 35mm FF (used but in good condition) $20
1X #6737 35mm which is filed $10
7x #6737 35mm all in good condition for $20 each.
If anyone has desire for the whole set let me know and maybe I can make a deal.