Odd cryptic number/letter stampings found on 63

[bobs409]

Any idea's on what these mean?

Stamped on metal retainers for kick panels:
7801W18

Stamped in recessed area for lower LH door hinge:
2WA19

I compared these to my VIN and nothing even close to these.

 

[MRHP]

Probably the part number for that piece for assembly line workers.

 

[bobs409]

The second one is stamped into the body panel that the hinges bolt to. That part would have been done at Fisher. ??

 

[MRHP]

Most likely an identifier at the stamping plant for the individual part.