Old and used steampunk mechanic/engineer glasses.
Frame made from absolute scratch using metal from cans, itsy metallic bits from an old TV's circuitry, metal wire of various gauges, flux & soldering wire, and burnt fingers.
Worn out and coloured with heat, polished with a rotary tool.
Ear tips created from dipping the frame tips in liquid latex.
Lenses cast with Crystal resin coloured with a few drops of greengold vitral paint.