Maxwell Motors started building cars in 1904 and grew quickly. Their toolkits used stamped steel tools like this one and apparently after 1921 these wrenches were only identified by numbers, 1, 2 , 3, 4. More here. Oddly, they are plentiful on ebay.
The company was acquired by Walter P. Chrysler and when the Chrysler Corporation was formed in 1925, Maxwell was shut down.