I have to admit, I love how model numbers run all over the place sometimes completely disjointed from what we’re used to seeing. There’s a 9mm? 4691 on a popular auction site. It doesn’t fit my current collection or direction, but it just caught my eye.
I was about to say there's no such thing . But then I looked it up in the bible and it's a transitional piece . They state that it's quite rare which translates to fewer than 200 . I have a 6590 which also a transitional . Some people are attracted to these models , but I gave up . You just don't see them , it's more luck .