Gogo Key Blanks

Not every key arrives with a code on it. Where the bow is worn smooth or the original is long gone, a blank is matched by the blade instead: the shape of the milling down the sides, the thickness, the length and the number of cuts.

That is best done against the lock rather than by eye from a photograph. Where you can, work from the lock itself or a clean end on view of the blade, and confirm the profile before anything is cut.