This Vintage Corning Ware Blue Cornflower is in Excellent Condition.   It is 1 3/4 Quart Baking Dish   The numbers are P 1 3/4 -B.   The Lid has 2 sets of numbers 36 and P-7-C.  These numbers represent the years.  P is the original which was from 1962-1971.   The B means Buffet.  I have MANY of these pieces, all in excellent condition.  If you are a collector let me know what pieces you are looking for and what pattern.  These have been in only one family in a smoke free, pet free home.