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At least it looks to have a solid top - look at the edges of the soundhole in the first additional photo.

Believe it or not, there are some people who actually like that type of tailpiece!...

Unless that has a country of origin listed my guess is that it was built in Korea. That's where those tuners seem to spring from. It also looks like a group of instruments that were sold by a seller...

That style of assymetrical tone bar spacing was introduced by Gibson in 1922 on the first F-5's.
It is probably still the most common bracing configuration used in f-hole mandolins.

Here's a video i've posted over and over (and probalby watched a hundred times myself), Bush/McCoury/ Skehan/Joliff, Hoffman. You don't really want to coyp anybody, it's more getting ideas to try...