Wooden rounded corner picture frame, slightly smaller than Daikoi size, suitable for both Japanese and Nordic styles

This is an old, wooden, rounded corner picture frame.
I think it can be used for both Japanese and Scandinavian styles.

The wood type is unknown, but the grain is visible.
It's a dark brown color, like walnut.
The corners are mitered joints.
There are scuffs and paint loss that can likely be covered with retouching.
Dimensions are:
Inner dimensions: 38 x 50 cm (1 cm smaller than a Daigai size, a mysterious size)
Opening dimensions: 37 x 49 cm
Outer dimensions: 40 x 52 x 3.5 cm
The front material is acrylic (?), with adhesive tape marks and small scratches.
There is a green fabric-covered board inside (with some color fading and stains), which was likely used as a mat or to sandwich artwork (it can be removed, of course).
It has been in my home for over 15 years (stored in an indoor warehouse for the last 10 years).
I think it can also be used as a frame for drawings or a mirror.
I have too many frames and no longer use this one, so I would be grateful if someone could make use of it.

No original box.
It will be wrapped in bubble wrap and sent in a cardboard box (using recycled materials).
Approximately 100 size.
Shipping will be via YuYu or RakuRaku Mercari便, with shipping costs included.