Alpa leather focusing bellow (no loupe)
Condition is excellent plus. You can fit in your own selected loupe to view the ground glass, maybe 3-4x for 6x9 film, maybe 10-12x for tilt fine-tuning. It's much more flexible than the build in model. The leather quality of leather is really great.
Alpa part no. 310.010.020http://www.alpa.ch/en/products/framing-focussing/ground-glasses/alpa-leather-focusing-bellows-delivery-without-loupe.html
US$165, paypal & shipping included.