The OP's 1963 D quarter is not a type B. No Denver mint type B silver quarters have been found yet and I doubt that there ever will be.
The type B like 1969 D - 1972 D quarters are now called type H by the
CherryPickers' Guide. This is because they have a minor modification to them. The tailfeathers now have a centerline like other clad quarters of the period. All the type B pick up points still work.
The same
CherryPickers' Guide now calls the old type M, type G.