Antique Chinese Bowl from the 17th Century ??? Signed ''RARE''

I dont know the exact year but looking at others similar it shows the 17th Century, it is clearly signed on back, and this come from an antique auction of alot of asian antiques, i have one more bowl similar but  only has 3 letters or words on back

You can see the bowl is hand made and not made even, so one picture shows it upside down and you can see the gap and not setting flat all the way around, plus you can see the swirls of the makers marks when made by hand, THIS IS AUTHENTIC  and this is an ANTIQUE  but the True year is unknown to me

It measures 8.5''inches across top and is approximately 4.75''inches across bottom ring and approximately 1.5''inches deep

WOW''' Is all to say to this Wonderful antique bowl, with blue pattern, some say there Dragon's, some say they are Bat's,, but i really do not know what to call the pattern as im no professional in this area

'''PLEASE''' VIEW ALL PICTURES GOOD BEFORE BIDDING