There is actually no kerning present. There are several locations where the lower case "a" looks like it is kerned with the next character, but it is because the "a" is slightly offset to the right, so it looks like it is kerned with the next charachter. This is in fact a characteristic of manual typewriters. Because the hammers to collide at times, it is possible for one to get slightly bent and therefore offset.
For other reaseons, I still believe the document is a forgery, but the kerning argument does not hold up.
Good observation, thanks!