anormphia

An official Bolex rebrand, or fake? Because I cannot find anything on this Bolex lens, but that might not be evidence for either side.

This:

I recently came into a Bolex 16-F 2x anamorphic lens in mint condition, with caps, box, and case. I can't seem to find any information on this lens, leaving me to think it's very rare. Bolex is quite a popular name in the anamorphic brand list, Does anyone happen to have any more information on this lens? History, rarity, going-price?