I've had a search on the Panasonic/Technics web sites using WSA-1 and WSA1 and there is only one reference to this instrument, in a Technics History document. You could try contacting Panasonic at www.panasonic.com or(co.uk)depending where you are. Although they don't list any manuals as being available for that model, they may be able to provide the info you require.

------------------
Willum
_________________________
Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)