I gave away a few 105mm Durst Componon lenses here a few years ago, they'd come from roll heda printer turrets, they like the older 50 & 80mm Componons were 25mm thread. I've got a few Componon lenses and a few Componon S 50mm -300mmall are excellent performers as are the Rodagons I own.
The roll head turrets came with cone extenders all 39mm thread as well as threaded tubes 39mm outside thread, 25mm inside. these were for adjusting the degree of enlargement and focussing, also the lenses had a grub screw to lock the aperture. The lab I got the lenses from skipped (sent to landfill) most of the equipment, roll head printers followed by the LF enlargers.
Ian