... 3atm/5atm water resistant 5. Japan quartz movements We,Gotop manufacturer,is a professional factory,on the market ... dark blue,yellow,green,orange,grey,coffee & etc.We can also do the color according to your PMS ... -200pcs as a test to see the points we have to pay attention to during mass assembly ... heads.5.Water resistance of the watch heads-we test every single watch head's water resistance6.Assemble the ...