That's aluminium, not aluminum. Both "Jura" and "Aluminium" spelling would lead me to Switzerland. Also, what I take to be a Swiss cross. I'm not sure about the crown.
I wonder if the movement and case are a "marriage". The case appears to be for a stemwind movement, rather than a KW/KS with a cylinder movement. The holes in the cuvette do not look factory made, and may have been added when the KW movement was fitted. I agree with Glyn and Kevin, I believe both the case and movement are Swiss.
Page 229 of Kurtis Meyer's book shows a Jura Watch Co., Delemont Switzerland. Jura is a brand name used on watches, movements, lever, cylinder and Roskopf System. The trade mark was registered late in the USA, 1948.