E6 Double Transfer?

I can never tell. Not much of a premium for this stamp, but is this the double transfer?



As opposed to the normal:

I was wondering if any US Special Delivery Experts were out there to verify my, supposed, Double Transfer. My Scott's Specialized just mentions that it exists, but nothing in more detail. I scanned my stamp in a little higher detail, and it looks like the doubling, if any, is in the left, extending right only about to the peddling area. Does anyone have another copy they can show me? Thanks in advance.