Re:
NorfolkSouthern: Mine slows down just a tiny bit during spin spray, but it's barely noticable, if it's significant on yours, I'd clean the rollers first off and check the belt tension (1" deflection) If there is a way to tighten them someone who knows more than I do will have to chime in one that. I've never worked on the 1-18. Matter of fact, from the looks of mine I don't think it's ever been worked on except the timer motor.
Now about that emblem on the 1-18. I wondered if that would get any remarks. There's nothing original or "limited edtion" about it. I bought that off ebay, one day I held it up to the 1-18 and it looked so nice there that I just decided to put it on. I don't even know what it came off of, but it appears to be something from the 50's. I felt that it may be inappropriate, but it is my machine and I decided that I was blending "vintage" with "really vintage".
Now to end the wonders about the Whirlpool. That is a DD, dual action, WhirlShred. It's not worth a damn compared to the Frigidaire's. I use it to wash underclothes and dog towels in. Pretty soon, it's coming out and another little goodie is going in it's place, but more on that later...
The Filtrator, yep it's the one Hans found. It's in pretty good shape too, just a little cleaning, dust removal, and a new cord, after that we'll see if she runs.