OK, YOU WANT A Field / Aviator WATCH. LET'S PICK THE MOVEMENT.
For movements, we have just three basic choices. Automatic, Quartz, and Manual
The movement (caliber) is what makes a watch tick. Described as the heart of a watch, movement refers to the mechanism that drives the hands on a watch face and powers its complications such as calendar, chronograph or a dual time zone. Luxury watch collectors prefer watches with Mechanical / Automatic movement, while quartz watches are preferred for regular use given their superior accuracy and reliability.
The automatic movement is almost identical the manual watches, except you do not need to wind them by hand. This movement winds itself when the wearer moves. Classic style of the manual caliber movement combined with self-winding makes this movement very popular and very convenient. It can add to the price however.
In 1969, Seiko introduced the quartz movement. Quartz watches are battery-powered and do not require winding. Generally speaking a Quartz watch is less expensive to build, usually thinner, keeps better time, and are more durable, making them a very good choice, especially for everyday wear watches and budget minded people.
The original and oldest movement of the three, the mechanical movement has been used for centuries. Classic hand wound watches can connect the owner to the watch in ways the others can not. Manual movements can also be the better looking of the 3, since the clock works are not obscured by the rotor.