2000-D LC - Where Can I Check For RPM & OMM?

Very enlightening, Thank you. I actually use this site quite a bit and had read through this before starting on my coin adventure. I had completely forgot about the ending of the RPM's etc. I mostly like to go through my wheat cents and they prove to be quite challenging. I still do not have a confirmed RPM or OMM. But I have only be doing this for about 3 months. The members here have been great and I am learning a lot, it is just not all sticking in my head.

Right RPM and OMM are impossible after 1989 Since the 1990 the MM has been in the master hub not punched into the die. the only way to have a doubled M after that date would be either Machine Doubling which is damage, or a doubled die. And afer 1996 when hey went to the single squeeze hubbing doubling from a doubled die is pretty much impossible. An OMM after 1989 would have to be a doubled die and after 1996 that would also be impossible because the D and S mint dies were no longer made in the same place..