The accordion has a serial number 22745 on the reedblocks. Inside you will also find a date entry on 22 July 1945. One reedblock is in the cassotto section, but the register mechanism is different from the current models. This is therefore a model that is a step less developed model than the current cassotto, but in time a pioneer. The visible melody side register buttons has been placed on the accordion afterwards. The treble’s key arms have distinctiveness as the arms that go into the cassotto chamber are riveted to the main arm very close to the bearing point.