Contour interval in TOC

[Lohengrin]

Yes, I would refuse to change the contour interval because the elevations are accurate and I don't want to diminish the realism, as you say 76mm.

My inquiry has more to do with the rationale for choosing one contour interval over another. In addition to France '40, I noticed Bulge '44 also uses the 50m interval. Whoever makes this determination, what influences the decision? Personally, I prefer a 20m interval but would be interested in knowing how larger intervals came about. I can understand the Sicily map where, I believe, there are actually 100m intervals in places. But for non-mountainous or overly rugged areas?