It's tough to be 100% sure from the pics but I'm pretty sure it's an asymmetrical setup (30 series). The back face of the driven looks pretty flat as does the back of the driver.
Fishblock, when you look at the pulleys, do they look like:
\|
/|
or do they look like:
\/
/\
If they look like the top you should have an asymmetrical belt, like the bottom a symmetrical one.
