The accordion has a serial number of 23073 on the reedblocks, a beautifully engraved “N 3” on the back of the treble and the date 6.3.1943. The instrument itself is built with extreme quality. For example, the wooden back plate of the bass is covered with celluloid on both sides to avoid bending, the sequins are metal and the mechanical solutions of the mechanisms are thought to the end.