The glass inkwell has a black Bakelite lid. The well is marked on the bottom: GEM No52 Nov 5, 1912 (which is backwards!) and another hard to read marking. These marks look to be repeated on the underside of the Bakelite lid: Pat. Nov. 5, 1912 / The GEM / C&D Mfg. Co., N.Y. U.S.A. The glass has a stop in the well that allows the lid to turn just far enough to expose the pen dip slot.

The koa wood inkwell base has two pen rests and a Hawaiian Coat of Arms decal.