1970s to 2000s, Los Angeles California, USA
Walter Woods information site Walter focussed on compact bass amplifiers.
Talk Bass thread about Walter Woods From this thread you can date Walter Woods amplifiers:
The serial numbers on these amps can be seen by simply removing the four screws that hold the top panel on. The numbers are stamped into the top of the large heatsink. The last 2 digits in the serial number indicate the year the amp was made.
But this doe snot seem to make sense for this serial number [SN 128-5257] written on the external heat sink of this amp:
Reviews are at Harmony Central
Image Walter Woods Bass Amp eBay: