Imperial c1920

English dominoes press molded. The material might be a mixture of carbon, glue and egg white. This was used as a substitute for early plastics due to shortages caused by WWI. Note the warning on the side of the tin to not use hot water for cleaning.

Domino Size: 1-7/8 " long x 7/8 " wide.

Original printed, tin container with a hinged lid..