Mike, to keep things on track my 1:64 model of 74 is the PBL import:
I bought it off someone, and sent it to 7th Street for DCC and sound. Mr. Poole identified the odd markers. My guess is that PBL based the markers on those used by the RGS, and during the prototyping and proofing process did not note the difference on this version. Curiously my models of 75 and 76 have markers closer to the C&S prototype, though larger than the ones on my Overland models.
Please post some photos of your coal boards. These are on my list of things to build. After all, it is the jewelry that really makes the C&S hogs distinct!
Keith Hayes
Leadville in Sn3