Antique Royal Crown Derby or Spode Imari Flowers Teapot with Lid Circa 1810 Gift

10 1/2” long. Crazing. Subsurface crack internal and external. Spout and inner rim have chip. Spout has crack emerging from chip. Pictures are part of description, so please review. I believe this is from the 1800s. I have filled it with water and it does not leak. Gold and florals are in excellent bright coloration.