A modded watch may have changes to parts you’ve never considered before. It’s always good to be familiar with these terms when purchasing a modded watch.
Not noted::
Crystal: the clear part through which one reads the time. A crystal can be plastic (of various types/qualities) or glass of various types/qualities, including sapphire.
Case: the “body” of a watch, which made of various materials including plastic, metal, and high-tech ceramic composites.
Case back: The case back clips into, screws down into, or is screwed down onto the case. This closes up the watch with varying degrees of dust and water resistance.