I haven't been able to find a page that can tell me about "First" and "Second", but this link to RelapseRecords:
http://shop.relapse.com
tells all you need to know about the different pressings of "Red Album" and "Blue Record", and other bands as well. Just search for Baroness, left side.
I noticed "Hyperrealist" answered "evenscore" about a brown version of the "First"-album, being a second press. Maybe he could tell us how he knows? Or even better, give us a link, if possible?
By the way, a question to hyperrealist:
I've noticed that both "hyperrealist.com" and "relapserecords.com" press(and sell) albums for Baroness.
How come? And is there a difference?