I don't know but I'm having my doubts, which however are based on very little knowledge of Rinko in general and so could be wrong.

My thoughts though are that Rinko is relatively new (yes, no?) and this headset just reeks of the 70s. It's not new at all in its construction. I wouldn't doubt that it's original to this frame which is an early Bottecchia and I think probably early - mid 70's (although I've never seen one like this on a Botty). Also, all the Rinko's I've seen use a cartridge bearing allowing for easy clean handling when the fork is taken apart. This uses plain old caged balls.

Not much to go on, certainly not definitive, but it's got me thinking otherwise.