Create an image of a vintage, steampunk-inspired machine that doubles as a high-end business executive's desk accessory, with gears and levers that control a miniature cityscape model.

Design an elegant steampunk-inspired machine that operates as an executive desk accessory. The machine should exhibit intricate details reminiscent of the vintage style, with gears and levers that play an essential role. Activating the levers should manipulate a miniature model of an urban cityscape, signifying a control panel for the city. The model city should exhibit ample detail, capturing architectural elements of a metropolis. The color scheme should adhere to the customary bronze, brass, and brown tones prevalent in the steampunk aesthetic.