Pewter ship inkwell

This old inkwell is made of pewter and above all has a system. The glass inkwell is placed in a rotating ball which is itself covered by a half-sphere dome which closes the inkwell. This should make it possible to stabilize the ink level despite the rolling: -) there is also the part to install 3 nib holders. Its dimensions are 9 cm in height and 15.5 in diameter. 751g.