I read that a Seiko model number, such SBDC001, is only partial and ends in either J1, K1, P1, J2, K2 or P2; apparently indicating where the watch was made (J1 - Japan). Question to all: does this matter to watch quality? If I buy a Blue Sumo from an online Japanese JDM supplier, will I be...

I have a 6000 series Tag Heuer watch. Model Number WH1251-KO. Can anyone tell me what the KO stands for? Also my watch does not have the inverted traingle at 6:00. It has a regular slash mark. I have seen a few photos like this, but rarely. What does this mean?