[Hornlist] Yamaha Horn Model's 664 764 - Anyone have one or use one for college or Professionally?

Dear Hornlisters, Just curious if anyone has or does currently use and older Yamaha model horn # 664 or 764 ? I have heard various things online about these being really reliable great Yamaha horns and not really student or intermediate models as they were originally claimed to be when first

Re: [Hornlist] Yamaha Horn Model's 664 764 - Anyone have one or use one for college or Professionally?

I have a 664 and it's a large orchestral horn - not what I would want for chamber music. Otherwise, it's very nice, though slightly stuffy about the top range. When I discussed this at Paxmans they nodded sagely and said that it was a known problem - the 668 is much better in this respect. I have