Material Good thoroughly checks the mechanics and movements of all pre-owned timepieces before offering them for consideration.  We also offer a 1-year warranty on pre-owned timepieces purchased through us. This warranty covers certain mechanical issues that may become known only after the client wears it for an extended period of time. Each watch is covered on a case-by-case basis, at the sole discretion of Material Good. The Material Good warranty does not cover damage caused by water exposure or physical impact. Our certified watchmakers will inspect any timepiece to determine the cause of damage. Material Good reserves the right to void the warranty if the damage is found to result from water intrusion or impact.