Photos show 68 and earlier, but principal still applies.
With a flat L shaped piece of spring steel, sized to fit into the key way.
Apply rotational pressure toward the run position.
While applying the pressure take a paper clip with a short hook on the end and depress the farthest in pin / wafer slightly till it moves up and you should feel a bit of a click in the spring steel L
Repete for the rest of the pins.
Old loose lock cylender are pretty easy to pick.
Or as others have said pull the entire lock and cylender and any locksmith can remove it for you.
The right one might not even charge you if you buy some keys from him.
Another method is the twist any key that fits into the keyway to the run position and rapidly saw the key in and out.
Lastly if you don't care about the cylender you can drill out the retainer pin.
If you are trying to replace the actuall cylender, see the lock smith. Springs, pins in the correct, hole, not easy.
You going to go to the golden super Cruse July 2nd?