UV light flashlight
UV light is perfect to examine imperfections, repairs, damage, mould, faded inks, which were difficult to see, can become quite obvious.
UV light and the luminescence, or absence of, can also provide clues as to the material/s an object is constituted, or not as the case may be. With prior knowledge of the behaviour of various objects and materials when exposed to UV light, identification and dating can be made easier