Pitch Pipes

Pitch Pipes, 13 Free Reed Nickel Pipes, (C,C#,D,D#,E,F,F#,G,G#,A,A#,B,C), each pipe labelled at one end with note and the other with the tonic solfa where equivalent exist, and inscribed Eolian Pitch Pipe and John Greaves & Son, in a fitted red leather case (lid two splits), from the Wheatstone Laboratory Collection and Concertina Museum Collection ( Paper label C504 LID, F3 Base)