All About Pocket Knives

I found this Case pen with 2 knife blades that folds into the pen. The seller said it`s a 1989 Casexx Centenialll Combination ink pen and pocket knife. The thing is the pen clip reads Japan. Has Japan made any prmotional items for Case in the past? Any info would be helpful. Thanks. Henry

Do the blades have a tang stamp, like a Case pocket knife blade? I feel like I saw a pen like that in eBay. Pics would be helpful too.
Edit I found this: I do not see a tang stamp but it states the blades are Tru-sharp steel.

Here are the pictures of the one I have. If it wasn't made by CASE I have no idea who made it.

Those are "cool". dont think Ive ever seen one?

That was an oddball Case item - offered for a very short time late 1980's. IIRC, no tang stamps, and they were 100% made in Japan. Not one of Case's better product decisions.