2005 NW-A1000
The NW-A1000 is a Walkman with a hard disk drive, part of the first generation A series.
2010
NWD-W253/Z
The NWD-W253/Z is a color variant of the 4 GB W Series Network Walkman. It retained the identical clip-style operation. It carries 4 GB flash memory for MP3, AAC, and WMA playback, with lithium-ion battery for 11 hours and ZAPPIN previewing.
A regional or finish variation of the same W253 platform, carrying the same role as the base model. The underlying idea remains unchanged.
