Antique Staffordshire Jackfield Black Pottery Teapot Ivy Mourning Victorian

Stunning and rare teapot used as I believe at funerals. Condition is great apart small chip on the spout. Please study photo. Measures approx 17cm in height and about 30cm wide with the handle and spout. Thanks for looking.  I have another teapot and Creamer and a jug from the same set.