For your consideration is this original Martha Sleeper School Days bakelite pin. As you can see there are 2 stacked school books bound by a brass tone plastic strap & dangling from them on brass chains is a black bakelite inkwell & a red bakelite pencil. The pin back is heat set with a rollover safety closure. Measures overall in length 3''. There is a tiny bit of plastic coating missing to the book strap that is barely noticeable but I want to note it. Overall condition is very good, tests positive & guaranteed vintage bakelite.