I believe this is quite old, but I can't tell for sure as there's no date inside. As you can see in the photos, the condition isn't great, but the text inside is still clear. The dimensions are: 21.5cm tall, 17cm wide, and 9.5cm deep. All three books have covers that are blank (or the titles have worn off?), so I'm not certain, but I think they are "Shōzō Matsu Jōdo Wasan," "Kōsō Wasan," and "San Amida Butsu Ge Wasan." The box only has one foot remaining; the other three seem to have come off.