"T" look I am going to make this real easy for you, go here http://www.ttw168.com/index.php?main_page=index&cPath=30_189 (you will have to do link twice) there you will find a vast selection of the watch you want. You will see 21j and then same watch more money with Eta or 7550 movements they are for the most part that is why they cost more, no brain surgeon needed to figure that out. Now READ!!!! that link you posted is not a trusted dealer here.
PS the guys name there is Andrew please do not drive him crazy with stupid questions and say your from here make us look bad, just order the watch and wait . You are buying an inexpensive watch not a house or choosing a partner for the rest of your life, so if you do not like sell and get another.