Yes, in the 80's the R10 was 3000ff. I was student at the belgium school and it was too much money for me at the time. The gun was case colored, no engraving and a plain clear wood. That was the last Darnes built in a bankruptcy atmoshphere. I guess they got a lot of actions ready to go and they finished the guns, chealpy, quickly, in vain. The same gun doesn't look better 25 years after and did not sale for more than a $1000, on the used market.
When Bruchet took the company, he did not make production guns anymore. He improved the mechanic as the esthetic.
From 1900 to 1978 some R11 looks better than some R15. Everybody have seen badly engraved and stocked high grade R and beautiful low grade R.
The good thing, there is still plenty of cheap R low grades from 1970's , and they are about the same price than 25 years ago.