open old lock, which tool? bend nail: which form?

[pillar]

Hi.

We have an old sewing-machine at home, retractable desk version.
There are two drawers, unfortunately locked.
The lock is like this:
http://abload.de/img/jcq0e.jpg

I tried to open it, but no luck.
My tools and wrenches are these:
http://abload.de/img/7tpvx.jpg
http://abload.de/img/x4qou.jpg

The white nails do not fit into the keyway.

I guess, I do not have the right tool to open it.
Perhaps a nail with a different form could open it?
Do you have any tips on how to bend the nail?

[GWiens2001]

You can go to a hardware store or a locksmith and get a key that will open the lock. Most of those on sewing machines do not have levers. It is warded, with just a flag.

Gordon

[Devhad]

Will one of your smaller tension wrenches fit in around the post? Usethe small end of the wrench as the flag. This is assuming there is no wards. Start in the bottom of the keyway with the wrench pointing down and follow the post around.