If you are asking this question, then you really have no idea what you are looking at. Go onto eBay. Do a search on 'Ludwig Acrolite.' Look at all of the pictures. Look for the common features that have been stated. Almost none of them will be chrome. So if its chrome, 99.99% its not an Acro. The Acro always has the center bead. It has 8 bowtie lugs in almost every case. It will have a Keystone badge or Blue and olive badge. The black galaxy has the black and white badge.
Edit: the 5x14 will have 8 lugs in almost every case. The 6.5x14 will have 10 lugs.
You're correct. I'm not an expert on the different types of Ludwig snares. That's why I'm on here asking the informed drummers. I also found another "beadless" ludwig online like the on in the picture that said it was an acrolite so I wasn't sure anymore. Thanks for the clarification on chrome vs. not chrome.
Well, just to open up your horizon's a bit (hopefully not too big a derail...), you can also look for a Ludwig Standard Aluminum snare. Why do I bring it up? Same shell as the Supra and the Acro, except WITHOUT the center bead. They sound virtually the same, 8 lugs, and that silver pain that later Acros have. I'm only bringing it up since a)it is a close kissing sibling of the Acro and b)you might be able to score one on the cheap if the person doesn't know what they have..... Here is a thread talking about this drum: http://www.drummerworld.com/forums/showthread.php?t=105304
As for Acros.... Check this one out. Probably a good one to jump on given the price: http://www.guitarcenter.com/In-Store-Used-USED-LUDWIG-ACRYLITE-14X5XSNAR-DRUM-MISSING-BADGE-108665985-i2973613.gc
Thanks Valkyrie. That is a tempting deal. Its missing the badge but I suppose I could always find one later if it still bothered me. I just checke out your thread on the Standard you refitted. Very nice looking drum. I'll keep my eye out for one of these too.