The biggest collection of bat-logos!! They're all amazing, you did a really great job, my friend!!! Can you upload as individual images the 1930s & 1940s logos, but if is it possible, without the inscription?
I'm glad you like it, of course you can use it as a facebook cover, in fact if you like I'll reformat it so that it fits the dimensions of facebook's cover photo with a little space for where your profile picture will overlap.
Download this and use it for now and when I have the reformatted version I'll message you.
Holy shit! That is really, REALLY impressive. Not only did you in full detail explain where each logo originates from, not only can you spot subtle differences - you have every single variation of the bat logo there ever was I could even hope to think about! I have never seen anyone do this before - not this throughout and proper! Simply wonderful, man. You should be proud of yourself.