Mamiya 135EE battery adapter/ battery?

[Bill58]

Back during my days when I was crazy (still am, actually), I wanted every kind of Japanese, compact RF made. During this period, I bought a Mamiya 135EE.

Now, I got to make it work. Anybody know which Kanto/ C.R.I.S adapter and battery or bare non-Mercury battery it takes to make the meter function properly?

The Kanto (Japan) website does not have any info on it.

Thanks,
Bill