Lockwood 600 Projection locks
I stripped one of these down I had under my bench today.
The key looks like this:
These locks are quite common in australia, on older style cupboards and desk draws.
This style of locks are fairly simple in design with the depth variation in the belly of the levers.
This means bypass of the bitting can be done with the use of a belly pick, which is either two wires or a wire and a modified flat keyblank.
This picture might explain how it works
Photos: http://rapidshare.com/files/126501949/Lockwood_600_series_cupboard_lock.rar.html