How likely to find documentation for replacement barrels?

[John Havard]

I'm considering the purchase of a D-grade Parker that originally left the factory with damascus barrels in 1906 but now has factory Titanic steel barrels with proper serial numbers matching. Other than the barrels it checks out perfectly with the serialization book.

Based on the much greater cumulative experience of my fellow Parker owners on this board, how likely is it that a research letter on this shotgun will yield a record of the barrel replacement? 10% chance? 50% chance? For obvious reasons, finding documentation for the barrel replacement would increase the appeal of this shotgun to me. I'm buying it for me and not with any specific expectations that it is overly collectible.

Thanks in advance for any input.