old DALAV 4 lever padlock

[femurat]

I picked this padlock I got from Switzerland with my thinned out key. I lifted one lever at a time trying to figure out what to do to pick it, and I felt some lever became harder. I noticed a sort of binding order even if I wasn't applying tension. I left the hard levers alone and continued to lift the others. Suddenly the shackle popped open.
I oiled the padlock to make it work smoother and to prevent further corrosion, as you can see it's pretty rusty.
Then I picked it a few times, it feels good when the shackle pops out with force

I decided to try and make a key for it by impressioning a key similar to the one I used to pick it. I blackened the tip with a bic lighter and inserted and turned then extracted and filed... I almost got there but I ended up filing too much.
Now I need to make or find another "blank" and start over again. I'll keep you updated.

Cheers

[femurat]

After I filed down too much the key I was trying to impression, I soldered some stain over it to give impressioning another try. Unfortunately the part that throws the bolt broke after a couple of marks.
So I found a small brass rod and soldered it on the top of the flag with some stain. Filed it square again and impressioned this ugly but working key. Now I need to find another blank to copy it.
In the second picture I draw the key profile, it's very difficult to see it in the picture since it's still smoked.

Cheers

[ARF-GEF]

Good job Femaurat! You got yourself a nice little padlock there