SONY NWS-1250 PSU

[Plamen Mihaylov]

I recently obtained Sony portable model - NWS-1250 from Japan.
There is a bottom label "AC 100V", however the PSU has 100-120V and
220-240V label.
The exact PSU model is Sony 1-413-548-11.
Is it safe to plug it in 220V AC or to wait the arrival of step-down
transformer ?
The other problem is that the disk has been wiped. Does anyone have NEWS-OS
CISC version media ?

Best regards,
Plamen