During the process of working on the waycar I got to know it quite closely. One element that seemed offending or out of place to me was a horizontal brass piece with holes next to the cupola windows.
See image below from the same Oriental Limited model completed by someone else:
None of the photographs from my research reference images was high resolution enough for me to actually identify the piece on the prototype. Thus, I decided to remove it from my model and to call it a “builder’s mistake”. See image below:
It is only now that I found a picture that not only allows me to identify the piece, but to understand its function. On the prototype, it worked as a window slide support for the cupola window (the vertical piece was probably a window stopper). The drilled holes were probably drainage holes, so water wouldn’t sit and create rust. Correct me if I’m wrong. See image below:
The piece was indeed out of scale, but it wasn’t a mistake. I won’t try to add a fabricated part to the model now that it’s finished, but I’m glad I have a better understanding of it now.