Hohner English Concertina 48-Button Treble

This is a Hohner English concertina (concertina) with 48 buttons, treble.
I bought it used, and as you can see in the photos, the exterior is quite worn.
As far as I can tell, all the buttons work without any issues, and all the notes sound clearly. However, the F# note on the left-hand buttons sometimes sounds a bit strange, like a faint or raspy sound.
The bellows (gusset) are currently in normal working condition. However, as it is an old instrument, I cannot guarantee that there are absolutely no air leaks.
Some Hohner 48-button treble concertinas have bellows made of synthetic leather that develop holes due to age-related deterioration. This particular instrument is not of that type. There do not appear to be any holes.
In my personal opinion, it is much easier to play compared to the Playtech 48-button treble concertina, which is more readily available in Japan. I purchased this instrument as a second instrument to keep at my workplace and enjoyed playing it. However, I recently acquired a 56-button instrument, so I have decided to sell this one.
I am not an expert, so there is a possibility of undiscovered defects or areas of deterioration.
A soft case is included. It is a simple case with little cushioning, so please consider it as a bonus.