Metal and red glass book-ends 1970s

A pair of very heavy metal book-ends, same size but small differences in the geometrical design inside. Each with two sections filled with red glass. The metal (probably iron) has a beautiful dark brown-greyish patina.

art. no. D-160 | height ca 10 cm., base ca 8 x 8 cm. | € 145,= | made ca 1970 | Metal (iron) rectangular book-ends. each with two glass filled sections