This toy is marked as a DC-7C and Northwest retained both the Electra and DC-7C in its fleet as late as 1968: I think the Electras served into the early 70s with Jet Set Travel Club also operating one in Northwest livery at that time.
It is made in Hong Kong. Only the upper body is tin plate, the toy is mostly plastic.
The lettering on the box is reminiscent of Braniff International titles. I've never seen a toy Braniff Electra, but what a great one it would have been !

