I have bottles with both spellings, so I guess either says the same thing. It looks like a keeper bottle, to me. I couldn't tell from the finish picture if there are vertical seams on it. If there isn't it is definitely a keeper. The 3 is the mold number, and the company was a good one.
RED Matthews
This one does have seams that stop about 1 1/2" from the top. I'm going to be posting some more pictures from a recent dig / rake trip. It is interesting I found this bottle and others not underground digging, but around an old home site in a wooded area. 7 of the bottles found had the "purple" tint, some not as dark as others. So guessing these bottles had been exposed for a number of years. I also found a Pepsi bottle that was light purple also. Though it has some cracks, which are not all the way through, very good find as well. Gonna post in soda bottle forum..