brass goggles with at least 6 different interchangeable magnifying lenses of varying sizes that flip down in layers, complete with tiny gears and springs that serve no apparent purpose. Maybe add some miniature pressure gauges, a small steam valve that occasionally puffs (because why not?), and multiple adjustment knobs with elaborate engravings. The headstrap could have unnecessary buckles and brass fittings, plus a few dangling chains with tiny tools attached - like a microscopic screwdriver or a thimble-sized spirit level. See more