Cast base looks very similar to the Knapp buffing wheel, but I cannot find this saw...
(Attachment Link)
I don't think it is Knapp. In doing some surfing, I came across this website:
http://www.lathes.co.uk/knapp/
I agree with Charlie, not Knapp. Pericaud I think merges with other manufacturers much like J Comby. At that point they seem to lose any "GP" marks and resort to "Made in France".