Currently working on making a key for a Ministry of Works padlock. Femurat has a good writeup on the MOW padlock, but thought it would be interesting to make a topic for locks that use keys with moving elements.
Please post pictures of your locks (and keys) that have keys which require a moving element in the key in order to operate. This means MTL Interactive, BiLock NG, ABLOY Protec 2, and all the other keys with moving parts.
Anybody know the oldest key with a moving element?
Here is the MOW padlock, and the key which is still in process of being made and tested.

The key thus far:

And the moving part moved by my finger. (The epoxy is still drying, and have not cut the pivot pin yet.)

Would really like to see what YOU come up with! Bet we can find some interesting stuff.
Gordon