Like many (if not all), I too, am a huge fan of Wiseman's art and am thrilled to actually find a forum of similar folk. My DTM history starts with the In Hawaii story from '73 and began a quest to get all the early issues. I am in awe of Wiseman clean lines and sense of balance and perspective that I lost all interest in the "looser" art of later issues. I think my favorite Bonus issue is #4 Vacation special where they go to Monterary and meet Bing Crosby. Beautiful art! My collection is far from complete and nowhere near what many here have, however I do have all the Wiseman issues including a VF+ issue of #1 (it isn't slabbed, but I bought it from Metropolis in NY about 15 years ago and they had it listed as a NM). I also have VG copy that I bought for $30 when I was 18. I have a few pieces of original art, a daily from Oct '51 (it's the panel that's actally reprinted on the cover of those little metal coasters that came out in the early 50's, the gag is something about a "tantrum") that I'm sure was drawn by Ketchum, a fantastic '53 Sunday with Dennis and father on a roller coaster (that I, at least, think is inked by Wiseman) and a page from issue #3. I have to agree with all of you, that as a person looking for high grade early issues they are extremely hard to find. In thirty years of looking, I've seen around 6 copies of issue #1 with only one in as good of shape as mine, but that doesn't mean they don't exist. I too, am always amazed to see a Richie Rich #1 (which I also have and love) file copy go for crazy money (3K and up) and yet Dennis stuff in that grade, which I know is more rare. doesn't command any where near that.
Finally, to add my two cents in on the actual first day of DTM, I think the Fantagraphics press release is incorrect. (By the way, they are NOT reprinting the Sunday strips as part of there upcoming series, major disappointment) I believe the first strip debuted on March 12th 1951 (not 14th). Why?? The 12th was a Monday (the traditional day that a new strip would start), Maurice Horn in the Encyclopedia of Comics lists the 12th as day one, and finally, the Seattle Post-Intelligencer, which was one of the first papers to publish Dennis (and they still do) during the week leading up to the 12th were publishing little Coming On Monday teaser ads. I have attempted to attach a .jpg of one, so we'll see if it works.
I really love hearing all your stories, and seeing your collection. More later.
Jim