I took a hard look this weekend at a Fuji GW690 (1978 model) from a dealer I trust who said it was recently CLA'd. However, the aperture ring was difficult to turn. I did not purchase the camera because of this.
How hard should the aperture ring be to turn on a GW690? I'm comparing it to what I know best: Nikon AIS and Pentax 67 lenses. Your advise is most welcome.
It should be no harder than what you are used to on the Nikon an Pentax. Maybe it's just a simple fix that's needed but I'd question the recent CLA. Did you ask the dealer about the issue?
On the one I owned, the ring turned smoothly. It wasn't single finger rolling back and forth, but I wouldn't even think of using the word 'difficult' for it.
It should turn very smoothly. But that does not mean the CLA was bad. It could just be a very old and worn camera. I have a 50/1.5 Summarit that I acquired quite cheaply but with a stiff but not unusable aperture ring. I sent it to DAG for CLA. he did the work but reported back it was as loose as it was ever going to be because it was so old and worn.
Personally I'd take pass on this one unless you plan to use for slow and methodical studio or landscape work. For street or documentary style portraits or photos I cannot imagine working with such a stiff aperture ring.
On the one I owned, the ring turned smoothly. It wasn't single finger rolling back and forth, but I wouldn't even think of using the word 'difficult' for it.