quadrangular vignette with copper details

quadrangular tetragonal four-cornered quadrate square vignette frame cadre metallic metal metalline tin-pan brassy copper cuprum ironwork iron spring gear cogwheel gearwheel screw-wheel rackwheel nut screw-nut female screw internal helix male external washer puck spacer collar rove shim wire spiral spire scroll loop volute wheel trundle castor roller caster steampunk steam punk mechanical mechanic machinal power-driven collage mix mix media