ireckon, are those compasses like the ones in the PSP? they sure look like it, although they also look like a lot of the ones I bought on the cheap in bulk and had shipped here from China, I'm sure the ones I bought imitated the look of these better compasses on purpose
What's a PSP? Anyway, if your compasses from China are not fluid filled, then they're not the same. There is a difference in performance.