Lachenal New Model Mystery

[Stefan]

Merry Christmas everyone!

I have a special Lachenal New Model, Maccann 55 buttons, serial No. 2607

Eventhough it has 55 buttons and is relatively small (see pictures) the right hand side goes down to C instead of the usual G. So it has almost the range of my 57 Wheatsone Aeola.

I have never seen another one like this.

Now, as you can see from the pictures, on the inside of the left action there is a stamp and a badge of the well known J.J. Vickers, but it has been crossed out with a pencil.

Do you have any idea why someone would do that? Do you think the Concertina is in its original state or maybe it was changed?