ROYAL CROWN DERBY IMARI DEMITASSE CUP & SAUCER 2451 (1909 & 1910)

THE CUP HAS SOME DAMAGE. PLEASE SEE PHOTOS. INSIDE IT HAS A YELLOW TINGE ON THE BASE AND SOME CRAZING AND A COUPLE OF DARK HAIRLINES.  THE DAMAGE DOES NOT SHOW ON THE OUTSIDE OR THE BASE GILDING ON BOTH SAUCER AND CUP IS GOOD WITH NO LOSS.
THE CUP IS MARKED 2451 AND HAS THE SYMBOL FOR 1909
THE SAUCER LOOKS AS IF IT COULD READ 2457 (COULD BE 2451)?  IT IS FROM 1910.

THE SAUCER HAS A RISED RIM AND MEASURES 4 1 /2" ACROSS.
THE CUP IS 2 1/4" HIGH AND IS JUST OVER 2" ACROSS.