How often does Longines Master usually maintain it?

Longines are generally maintained once every five years. Longines mechanical watches are maintained every 4 to 5 years. Watches, like other precision instruments, need regular maintenance to ensure perfect operation. The specific maintenance cycle depends on the watch model, climate and watch maintenance. Usually according to the usage of the watch, it needs to be maintained every 4-5 years. Total maintenance service has the functions of thorough disassembly, cleaning, oiling, reassembly, adjustment and inspection of the movement. Repair or replace any worn or faulty movement parts to restore waterproof performance. Case or bracelet renovation.