Japan Instrument YAMAHA Chromatic Harmonica Vintage Item

Nippon Gakki YAMAHA Chromatic Harmonica - Antique, Original, Vintage Item

Brand: YAMAHA
Type: Harmonica
Harmonica Dimensions: Height 4cm x Width 14cm x Push Button 1.4cm x Mouthpiece Thickness 1.6cm x Base Thickness 2.8cm
Outer Box Dimensions: Height 3.9cm x Width 18cm x Depth 5.7cm

This is an ultra-rare vintage item from the era when Nippon Gakki transitioned to YAMAHA.
The company name changed between 1956 and 1987 (around Showa 62).
As both Nippon Gakki and YAMAHA are written on it, it is estimated to be from around 1986.

Product Name: YAMAHA CHROMATIC HARMONICA
On the upper right of the box, there is a sticker indicating JIS'S 8501 Premium and Certification 5442.
There is a (C) sticker on the bottom of the box, with the price of ¥1,900 and the inscription NO. 1200 from that era.
Inside the box, there is a scale chart A=440 and a Nippon Gakki sticker.
The harmonica itself has 12 holes, and all notes currently sound clearly.
I have searched extensively, but while newer models appear, this specific one does not.
The top of the box has some minor scratches due to age, but the harmonica itself shows no noticeable scratches or dirt.
It will be wrapped in bubble wrap and shipped via Yamato Transport Compact service.
Ultra-rare vintage item!!
Price negotiation is not accepted.
...For reference...
It is said that the renowned artist Stevie Wonder uses the 16-hole version of this product.