Cool. Those are both telephone styles, typically used on local lines. They're both from (I think) around the 1900-1910 decade, but a Hemingray expert might be able to give you a more precise range. They are common styles, used by Bell and smaller local companies for many years. You probably know this, of course, but I'll add it for the benefit of the others who might come across the thread. The Number 9 style is CD 106, known as a "pony." The Number 12 is CD 113, technically a "telephone exchange" but most collectors call these "kegs." The two grooves made it possible to avoid stringing telephone lines in parallel. Parallel lines created "cross-talk" that some of us might remember from the days of wire connections.