I also have a Sakae pair without the SR markings I'd forgotten about and in exceptional condition. Threads are perfect on both, insides are spot on also, I took the photos with a hi-res camera so this shows up very tiny imperfections that are virtually impossible to see with the naked eye. The one on the right hand side SR variant I can't actually see this even when I've looked again on macro mode.
£12 for the Sakae/SR and £17, that includes 2nd class post.
let me know either way.