Digital Plarail & Tomica DX (Deluxe)

It's not a set, it's a D51 with no tender, and it's not Plarail, maybe Tomica diecast?

Take a look here:
https://blueplastictracks.com/showthread...6#pid61786

and here:
https://order.mandarake.co.jp/order/deta...1083803200

Great find. Explains why I couldn't find it while searching for Plarail golden D-51 and also how it would fit in the box, since I couldn't see a way for a Plarail-sized locomotive to fit.