Alright...........Here's the scoop on the "Official Sweepstakes" in question. I know these machines very well, as I have worked-on, and restored many of them.
The case is original, and the correct wood. It may have been refinished at one time, but shows newer scuffs & scratches. Not all of the cases came with painted indentations on the two sides, and the ones that did, had silver paint, not gold. The back door is original, and the correct wood. The front casting has had the small areas repainted, but the instruction card is original. The cards came in two color variations, (black w/silver print & red w/black print). The mechanism is original, (note the rust on some parts), and appears complete, with the exception of the tilt-post & chain. There are several variation changes in their original castings, with the lettering on the upper front, and slight design changes in the lower casting of the gumball models. The inside playfield casting also had differences. Most had the tilt-post, some not. Others didn't have the smaller ball-stop posts, (like this one). The finish line on most, was a post in the 5 o'clock position, with a green lucite penant. Others had the finish post in the 6 o'clock position, with a penant or a printed sign, (like this one), although someone has stuck it in the wrong place at 2 o'clock. Some had cast letters at the front, on one or both sides, and not all said the same thing. The odds ring around the turntable is original. The turntable is original, but the horses appear to have been repainted, and do not have the horse numbers on the outside. There was also two variations of the yellow turntable. Plain, and one with holes, like this one. The steel odds ball is oversize to the original, and not correct, as a steel ball getting knocked around during play, had a chance to break the glass without the stop-posts. Most models came with a black marble. The curved background scene is a thinner-than-original copy, and not complete. It has been pieced together using duplicate sections, and in the wrong place, and the rear grandstand area is missing. The fronts of the scene on both sides are not cut at an angle, to allow placement of the slanted anti-cheat glass. The top glass that overlaps the front, someone has added a strip of metal or plastic, which is not supposed to be there. Lastly, the seller has sent me the serial number from this machine, and it is in keeping with the range I have for this model. Therefore, from all that is seen in the pics, I feel safe in saying that this example is an original, and not a repro.
Personally, I have never seen one of the repro's up close. Only in photo's, and some stick out like a sore thumb. There are differences that I can see in some of the ones that have been on eBay, and in the live auctions. So, all I can say, is if it looks TOO GOOD, you had better get authentication that it is a restored original. As far as I know, none of the repro's have serials, and I sure hope that the builder doesn't start putting them there, as it will screw-up the Serial Update Files that the late Dick Bueschel and I had been logging for so many years. These serial files have already had a 'fly put into the ointment', by the Jerk in Vegas, that has made Fantasy machines out of nice originals, that I already had the numbers from in my files. But what does he care, being from another far-out planet.