Slim, wedge-shaped, rounded-end rectangular case with snap-closure, hinged cover featuring horizontal, engine-turned ribbed bands and a rectangular reserve at bottom left engraved "R.H.K."; plain back is engraved "JAN. 24-18" in italic block letters. Folded tabs inside back at sides and bottom hold matchbook in place. Gold-washed interior. Inside cover is struck incuse at top left "TIFFANY & CO.", while inside back is struck along bottom "A.R.T.MFG.CO" above "STERLING" and "RE. PAT. NOV.29. 1917" above "4380" with a series of letters scratched between them.
Maker is A.R.T. Mfg. Co. of New York, NY. Firm made pieces for the retail trade, including Tiffany, Gorham and others; nothing further known, needs further research. Patent not found.