Crazy project finally completed. Genuine Primotar 6x7 adaptation. Metal parts, epoxy glued + safe screws. Minimal focusing distance improved a bit, now around 1.5m. This is big 1Kg lens covering 6x7 image circle. 15 aperture blades. Confirmed Trioplan bokeh (see Mark James Ford review). Smooth operation with internally clean glass and all coatings intact. This lens will give optimal results. Thank you for continuous support of my custom and restoration work. Price perhaps set high, but good price offer is usually accepted. Shipping Worldwide: Signed For, Priority, Tracking. EU 5-10 days, Rest 3-4 weeks. EU buyers: to avoid currency conversion costs i can relist in EUR if desired.