Unusual mechanical alarm clock with music box

Aquired this recently. I've not seen one like it before. Looks like a radio alarm clock but is actually a mechanical clock with a mechanical music box for the alarm. Case is plastic, movements are brass and steel. Made by Seikosha. Unfortunatley it's been dropped at some point so the case is cracked in places but I still think it's pretty cool. Didn't go when I got it, but took it apart, cleaned and oiled it and made some repairs to the case and now it goes and alarm works. If anyone knows anything about this I'd be interested to find out.