I probably do but the thing is - you can't see anything!
Thre is no visible line unless you know it it there and are looking hard in very good light, maybe with the aid of a magifying glass.
I remember taking an early example to a very experienced dealer at a Game Fair to see what he though of this old Purdey. He noticed teh engraving had been picked-out, that it had been re-browned and one or two other thinks but had to be shown that it was lined. Clearly this was a inspection in 'the rough' as he would have noticed given time and inspection of the proof marks etc but it shows how good the result is.
The problem is- if the lined barrels get dented, raising the dents is very hard. I know one barrel maker struggling at the moment to remove dents from the muzzle of a lined gun. The two steels behave differently and the adhesive must act as ashock absorber, making hammering or pressing dents out a real problem.
The solution - look after those new lined barrels! It is still a good solution to damascus tubes that are too thin to shoot but it is not a set of new damascus barrels and should not be considered as such.