I like precancels, although I don't have the catalogs (too many precancels and too many catalogs) but I do enjoy the history lesson of looking up towns or cities I never heard of to find their claim to fame.
From what I see in the previous posts, most of the precancels appear to be common (which is quite natural, considering there were countless varieties).
One which has me stumped, though, is Elcour, North Dakota, as posted below:
I cannot find it listed as a legitimate precancel in the series of precancel album pages, the town does not appear on any search engine, and I can't find any listing for a past or present post office by that name. Perhaps it's a fake?
I'll look forward to hearing from one of our precancel experts on this.