I just bought this plate/platter in an antiques shop.  Marked "ALGERIE" with diamond shape below.  Under diamond reads: N.W.PC with the letter B under that.  There is a small circle on top of the diamond with 1V in it.  The largest marking in the diamond is R with a raised "a".  In the four corners of the diamond, going clockwise, are 30(top)  K (right)  B (bottom) 3 (left)  There is also a 4 stamped on the bottom left of the plate with a 36 (?) below it.  Any guesses?  My search only brought up Algeria...

Thanks!!