Longines master 5 18 is a K-gold automatic lump?

Because Longines 5 18 mechanical watch has two forms: automatic watch and automatic watch, the automatic watch needs to be wound, and the automatic watch operates under the action of the automatic watch winding mechanism, which can be wound when the automatic watch rotates in any direction.

There are two situations in which the mechanical watch does not work. The first one is because of the lack of kinetic energy. The second is due to the failure of the mechanical watch. Common faults include bumping, dislocation of movement gears, magnetization of watches, drying of sludge after long-term storage, etc. These will cause the mechanical watch not to go. So, don't be too flustered when you find that the mechanical watch doesn't work. First of all, you have to distinguish which is bigger.