most advanced walkman I ever seen

amazing sound

no noises from motor or mechanical like in sony

That looks great! I love the color!  Does it only use the rechargeable battery pack?

now it works only from DC 4V

I tried to recharge this bat but maybe need more voltage for charging

sound is unbelievable 

http://kuromoriko.exblog.jp/12992656

link to japanese review with wm-40 and green JA100

Beutifull

seems that Ja100 smaller than wm-40 

will try to compare my units

color is just amazing for 1985:

and  check this ELUGA X P-02E (DOCOMO PANASONIC PHONE) 2013

colors almost same palette

 this turquoise color fascinates

yes it is smaller than wm-40

and most interesting is it size when cassette inside