David
The seller stated that "The gun was sent back to Hunter Arms at a later date and they added the 26" barrels with the same serial number and Hunter Arms in the rib and it has it's own fore-end"; so it is highly unlikely that the old shipping ledger was modified to reflect the barrel addition. As to the gun itself, I prefer the early Mongram engraving, like this example, to the later styles; these early guns featured a game scene (usually dogs) in an oval along with some very nice line and border work. I have also found Monogram guns with this early engraving pattern to be much more difficult to find. As to the gold lightening bolt, that is a nice touch and not too unusual on an early Monogram; apparently Hunter would place this feature on any high grade gun for a few extra bucks, as I have seen the gold bolts treatment on two Grade 5's.