4.5x6" eight-page manual issued by Ovaltine. Nicely illustrated and includes detailed two-page feature on the Key-O-Matic Code-O-Graph decoder. Heavy creasing and overall wear. Just comes along. 2.25" tall brass case which was made with no pin for wearing. Bottom edge has red notched plastic wheel which turns to show letter and numerical combinations in a pair of small cut-out center windows. Above the window is a slot for a tiny brass key which was used to set various combinations. The keys are much scarcer than the decoders as most kids quickly lost them. Key and decoder have luster wear to both. Fine.