Caran d'Ache "Patek Phillipe" Very Rare - Hexagonal Ballpoint Pen, Silver

Description

Caran d'Ache "Patek Phillipe - Geneva" Engraved,  Very Rare - Hexagonal shape w/ arrow design.  Ballpoint Pen - Silver. Vintage -  In Original Box.  Circa 1960's/1970"s
Condition is Pre-owned and used. Mechanism works fine. Original Ballpoint ink cart. is still in pen.
If the Pen looks tarnished in the photo's - it is. This is original Patina. I choose not to polish up before selling.
Pen is in Very good shape.  No visible dents or dings. ( it's hard to tell about scratches as the patina could hide them.
That being said - I dont see any.
I've taken a lot of photos for yur to examine the condition of this very rare collectable. Please look at them carefully and or ask for more if your interested. The pen is sold as is with the box ( box is worn )  - no returns.
In regards to writing - yes, the pen writes, but the cart is old and looks like it my need replacing.
I looked everywhere to try and get details or look for a comparison pen - I can not find one, so that verifies the rarity.
Shipped via USPS