China yoyo: Sun & Moon

this yoyo is called the 日月, which means Sun Moon.
in the 91yoyo forum, this design was also shared, 

this is the production laser engravement.
notice the first image is the written format of the chinese character, 日月.

no specs, not sure of maker name too.

it uses a concave bearing.
anyone got info on these mind to share?

pictures added.