Sorry, trying to get used to making a comment here. I have a G Shock gd 400, the strap width measures 15mm,I suppose it's considered 16mm? Anyway, looking for a nato strap and adapter if I even need an adapter. The watch has the screws not pins. I don't have a pic I don't know how to attach pic but pics are online. G Shock gd 400. Thank you. Sorry for all the comments.