On Facebook -JOIN I Antique Online.com: Collectors of Antiques and Collectibles.
Here is the link for the group https://www.facebook.com/groups/327133184409134/
Please join our FB group where YOU can post directly.
A Community For People Who Buy, Sell or Collect Antiques, Collectibles and Art
I'll let you research this site and I'm certain you could contact them and your item might be on their list: https://www.radiomuseum.org/m/orion_j_en_1.html. I still have a similar small cassette player that I used to carry on my belt and I'd attach headphones and listen to music. I'm certain that mine still works but I've not used it for many years.
Orion Electric Ltd, Japan is currently in business. I could not get a link (address) as their website is written in Japanese. When English is selected it loops you back to the start.
Wikipedia has a lot of info about Orion but nada re your player. It indicates that it was originally sold at Wal-mart.