When the sellers dropped it off, they said it had been the husband's grandparents' cabinet; I'd guess he was, like me, in his 50s, and he thought it was at least 50 years old. He added that he had no idea why they had it, because they didn't play music.

I'm somewhat skeptical that it's actually a music cabinet, under the circs.

Here's the interior. It's about 22" wide by 39" tall, not including casters.