by MacGyver101 » 17 Jul 2008 21:52
I've not seen that type of lock before... but if it's on a ceramic piggy-bank, I'm going to guess that it's likely a simple warded lock.
I suspect that the inner "plug" isn't in its proper position at the moment: can you freely turn the inner plug 90 degrees (counter-)clockwise? If so, the original key likely has a notch cut out of it that matches the two holes in the "plug", and I'm guessing that it pulls back a spring-loaded latch when turned to the left (much like a handcuff key)?