I came into a pretty nice old rifle a while back. It is a Winchester Model 52A that has been converted to a single shot only rifle. It was a well done job and apparently was done by an A. Hubalek--a New York smith and shooter from the 40's era. It is identified on the bull barrel as such. The single shot floor replaced the magazine etc and a full sized plate/trigger guard was put on the bottom. Now for the question--does it have any intrinsic value due to it being a Hubalek job or just an interesting old shooter?
Unless you find the "right" collector, it has no added intrinsic value... in fact, most Winchester Model 52 collectors will not like it because it has been modified outside of the factory, and will not pay top price for it.
Hello I can't speak for 22 smallbore rifle but have a number of Bulls-eye pistol in both 22 and 45Acp many of these were "built" by the old master" pistol smiths I have found that the old F%$#'s that know what these guns are and knew the people that built them Love the old guns but 99% of the new shooters could care less and 99% of collectors don't want anything to do with modified guns . This leaves a VERY SMALL group that would pay a premium for your rifle. It will most likely be a great shooter.
A barrel by Arthur Hubalek would add value to a rifle as far as I am concerned. What would not add value would be if the barrel was anything less than perfect inside. In that case it would be worth less than the same rifle with a factory barrel. This goes for all the custom .22 barrels by folks such as Pope, Peterson, Niedner, Johnson or Titherington.