I have a Markneukirchen guitar, Staufer clone, with a cedar top. But as this style was made well into the 20th century I cannot definitively date it. I suspect pre WWI but it could be later.
I've always found the lack of Western Red Cedar in European wood working (not just musical instruments but furniture, carving etc) a bit puzzling. I'm not alone as many of the antique furniture restorers and scholars I've asked about this are at a loss to satisfactorily explain this lack. It must have been known from the earliest explorations of the West Coast of North America. The Spanish were here as early as 1776 (In Northern California and Oregon decades earlier) and the Russians even earlier in the 18th century, probably before. Both these explorers were in contact with the Native populations and traded many things including raw materials so it seems unlikely that they did not know of the wood. But why it didn't make it's way back to Europe when so many of the other "exotics" did...it's not found in cabinet linings, drawers and other parts of cabinetry where other aromatic woods imported from the New World were often used. Organized logging came later to the Pacific North West than it did in South America but by the 19th century things were in full swing so it's a mystery waiting to be solved...
Scot Tremblay Guitars
"One picture is worth a thousand words. So, for me, one good note put where it should be put, will say what it will take some people many notes to say. ~B.B. King, 1986