i don't know what was going on at Gibson between 1969 and around 1972, but the logos are all really crudely done during this time. I've had a couple of guitars that had this, and many of the pictures in this thread seem to as well. I had a 69 Byrdland that was nice but the logo seriously looked like a fake!
You posted a photo of what you referred to as "Banner Logo" Gibson heads-stock. I believe the "Banner Logo" appeared like this here picture shown. Actually, I own a 2012 Gibson Southern Jumbo with Banner Logo head-stock. Banner is where the "Only Gibson Is Good Enough"
I'm re posting this from page 4 because, for one thing, it's a 91, not 90. Also, there is no dot over the i.
I've looked around google for other 91 LP Standards and they all have dots over the i's.
Did they just forget to put one on mine?