The perfect Yatchmaster Seiko Mod 
 
Dimensions:
Case diameter:  40 mm 
Lug to Lug: 48 mm
Case thickness: 13.5 mm
Lug width: 20 mm
 
Specifications:
316L stainless steel case
Sapphire crystal
screw down crown &  case back
Ceramic bezel insert 
120 click smooth gliding unidirectional diving bezel
Fully brushed bracelet with sliding glidelock clasp
The movement is a Seiko NH35 automatic movement which has been regulated to perform in or around +/- 10 secs a day and features a hackling and hand winding capability with a quick set date complication. (DO NOT SET THE DATE BETWEEN 10PM - 3AM)
 
Further info:
Grey sunburst dial
2.5x date mag window
 
Water resistance has not been tested but for all new components and seals have been used. currently splash proof but recommended to get it professionally tested if it to be used for diving.