100-300 ML Compact version????

Hi everyone,

I've just been surprised by a reference from a Contax AX user to a Yashica MC 100-300 f5.6-6.7 which he owns.  This lens is news to me but perhaps one of you knows something about it?

He refers to it as a late, compact lens which makes me think that, like several of the last MF lenses produced, it was made by Cosina; they certainly have this specification of lens in their catalogue.  I've asked him to confirm details of this lens and I'll report back if I hear something from him - unless one of you can attest to its existence. 

Just when you think the lens list is complete....