they did 2 popular quill stems, one narrow straight stem and a wider tilted stem with a peregrine profile, both nice stems, both quite scarce but not hugely desirable due to them being later than the pre mid 80s, if they are nos and clean, then £30-£40 each would be a ball park figure (on a good day, depending on demand), quite used ones go from about £12 up in my experience.