I attach few pics of my Lyman Keith 358429 single cavity mold, Hollow Point version.
What is odd (to me at least) is that this mold is not numbered as 358439 but as a straight 358429. The carboard box indicate that the mold is an HP variation.
It looks a factory made HP mold, but I may be wrong.
Could you tell me more about this particular mold?
Regards