The truth of most upgrades and enhancements of potential valuable things is that there is always something that is left undone.
Be that the forgotten underside of something, the wrong finish under something, the screw replacement that should be hand cut but is not or the forgotten "law" that says something present is an anachronism. Something out of place in time. Think of the wristwatch on a period cowboy or the Shakespearean doublet. Think of the clock striking in the time of Julius Caesar. These are not possible in the real world.
Perhaps this is what one sees when looking at certain "original" guns that will command that very high price if true and sent to Coventry if false.
The large faults are obvious to a casual observer and are often pointed out by the fraudster. Remember that it is the bane of some gullible men that they cannot see the forest for the trees. This is the most helpful trait that aids the purveyor of the disguised moderate in the dress of the best.
It is a wise man that asks the why of something that appears odd or out of place. Study the small things and this often leads the eye and mind to something larger.
Best,
John
