Here are a few more flanges that don't seem to match up with any lens I've got laying about:
#5 - Brass flange. 1.811" (46.8mm) x 26 TPI.
#6 - Brass flange. 1.476" (37.5mm) x 38 TPI.
#7 - Painted aluminum Flange. 2.061" (52.3mm) x 36 TPI.
#8 - Brass flange. 2.160 (54.8mm) x 30 TPI. (N.B.: on a protruding lensboard).
All of these flanges are mounted on 4x4 Masonite lensboards. The last flange, #8, is mounted on a lensboard such that the flange extends about 7/8" in front of the lensboard. I would guess I did this so that the lens would not interfere with a Packard shutter. I'm also guessing I made flanges #6, #7, and #8 (presumably for lenses I've long since disposed of).
I'll gouge you $25 apiece for these beauties, and then demand an additional $3 postage (1st class postage; you're paying an extra dollar for a padded envelope) for flanges #5, 6, & 7. Flange #8 will have to go into a small box, and thus will be shipping 1st Class Mail for $4. I'll happily ship these overseas, but it'll cost you more postage.
Paypal OK.
The flanges and boards are pictured below, #5 on the left and #8 on the right.
Charley