swatch sistem 51 . 90 hours power reserve 
+1
Sistem 51 now costs RM 560
IMHO, personally if I had RM500 to spend, i would go for a Seiko 5 or Seiko 5 Sports which can be had for approx RM 460+ after discount.
The quality of the components and finishing in Seiko is way better than that I have seen on the Sistem51. With all due respect, the Sistem51 movement looks like a china made movement...just try looking through the see through caseback.