There pipes originate from Germany. One of the pipes were made in 1898, the other in 1906. The contributor's wife is German and they adopted a German Prisoner of War as a grandfather, called Walter.
Josiah Wedgwood made his "Am I not a Man and a Brother" medallion in 1787 and slavery in the British empire was abolished in an Act of 1833. So this dates from those decades. The pipe's clay may ...