YAMAHA YA-48 Accordion, 48 Bass

This item was purchased used about two years ago.
The model number or type is not indicated on the main unit, and there were no instructions, so this may not be accurate, but based on my online search, I believe it is a Yamaha accordion YA-48.

This listing is for the following three items:
1. Main unit
2. Shoulder strap (one spot is frayed. See image 12)
3. Case (I believe it is in good condition for its age, but the felt inside is torn. See image 15)

The exterior of the product has some minor scuffs from use, but I think it is very clean for its age. There are some scratches on the bottom (they are not noticeable from a distance).

I played 2-3 simple songs for beginners, and it played without any particular problems.

After that, I checked the sound output note by note. For the two keys with masking tape on them in image 3, the sound played when the bellows were pushed, but not when they were pulled. I confirmed that other keys and bass buttons produce sound when both pushed and pulled.

As I am an amateur, the exact cause is unknown, but the bellows seem to be fine, so it might be due to dust accumulation over time.

Please consider purchasing with the understanding that this is an old product and has some minor defects. Thank you.