Horn looks like it should be a Leslie RS-3L. A lot of other types of SCL units had Leslie S-5T's. Both are only available from Des Plaines Hobbies as a brass kit (AFAIK). If its like other MTH horns, it has two long metal prongs that go into the shell and then are twisted inside the shell so the horn stays tight to the shell. You will have to undo that to get the horn out. You may damage the horn in the removal process. They use the same generic 5-chime horn for a lot of units these days for both Leslie and Nathan types.
The numberboard number font is incorrect. They seem to use the same numberboard font for every locomotive no matter the road. For the era depicted (no pulling for you), the headlight housing should be black, not silver. The no pulling for you slogan was post 1974.
I don't get why the big importers don't ask any modelers to proofread their artwork for them. Most modelers with a vetted interest would help for free.
[EDIT:] Number on side of cab looks smaller than it should be, but hard to tell from photos. My father had 2 units and a caboose shipped to me for weathering, so I'll check them out when I get them. I'll probably redo the numberboards for him while I'm at it. I don't think he cares about horn accuracy, so I'll prob leave those be.
Road number is smaller then it should be. But at least the headlights are in the right place even if the housing is silver. In some ways, I agree with SIRT although I don't think MTH cares. The only way you would get their attention is if everyone returned them.
