Is the Gevril Wind Master a real dive watch?

It is dive-style rather than a certified diver. It has a rotating bezel, luminous hands, sapphire crystal and water resistance rated for swimming, but no ISO diver certification is stated.

How big does it wear?

The case is 44 mm across and 14 mm thick, so it wears large and sits high on the wrist. It suits bigger wrists better than slim ones.

Does it need a battery?

No. It runs on an automatic movement powered by wrist motion, so it stops or runs slow if left unworn for days. Winding it by hand or a watch winder keeps it going.

Yes, the water resistance is rated for swimming and light water use. Avoid pressing the crown or bezel underwater and have the seals checked periodically.

Expect the watch on its steel bracelet, a presentation box and paperwork. Extra straps or tools are not standard.

How does it compare with a Seiko or Tissot diver?

It matches them on sapphire, steel bracelet and automatic movement, but those brands have longer track records for service and resale. The Gevril leans on its Swiss label and styling instead.