I love the graphics on these two pieces of sheet music, picked up from a second-hand bookshop in Cornwall some years ago - one of those places where you get sore knees from looking through boxes on the floor, a cricked neck from trying to see what's on the unfeasibly high top shelves, then come out covered in dust, sneezing and coughing and with that damp smell still lingering in your nostrils for the next week. But it's worth it.
This one's from 1922:
And this is dated 1938:
I adore the typography, the shapes, the flat colours. Must get them framed.