>>>The animal in the logo is supposed to be a
>>>combination cobra and manta ray, a bit of cryptozoology the origins of
>>>which I cannot explain.
>>
>>They're clearly originally from Dìqiú.
>
>Which is doubly odd, since they don't have guns there.
>

Hrm. But they do have metallurgists who are good enough to isolate platinum, and machinists capable of mecha - so perhaps one of said machinists or metallurgists crossed over during that time period to the big universe and decided to put their skills towards this?