Look down the open end of the hole that the shackle locks into and see if you see a screw head (or look on the bottom and if you see ONE round button sticking out, then the core can come out), if so, undo that and the bottom plate comes off, and the cylinder will fall out in your hand. Then either take that to a locksmith and have them make a key, take the whole lock with you and have a key made, or buy a new cylinder from Master or a locksmith.
P.S. that does appear to be a valid code # for a M1 master key blank.
Steve
What's involved in making a key for one of these padlocks? Something I can do
> myself? (I've picked a few locks around the house when keys have been > misplaced...)
>
> Can the cylinder ("plug"?) be removed?
>
> It has "0370" on the bottom.
>
> Thanks,
> --
> Dave C.
> snipped-for-privacy@mailblocks.com
>