Why is my antique LIFE issue different from the ones on the internet?

I bought the October 3, 1938 issue of LIFE magazine from a bookstore in Burbank, California called Film World. It's in very good condition. I looked up the issue online, and I noticed something weird about the cover. All the images of the cover I saw on the Internet had the tagline at the bottom left of the picture "Arms and the Men". However, my copy has the tagline "Czech Defender" on it instead. Do I have some rare version of it that was issued?