I recently purchased the Seiko 5 Sport 100M SNZG09K1. This is a military style automatic by Seiko with green nylon strap. It uses the 23 jewel self-winding mechanical movement called 7S26 series. The case is 41 mm without the crown. It has a day and date function as well. The case is stainless steel
It has LumiBrite hands and markers for great visibility and hardlex crystal for superior scratch-resistance.
The back is a see through screw down case back. Its water resistance is 100 meters.
Bought it for RM355.