That pattern on those barrels is gorgeous, and very unique looking!!

I noticed it too. Looks almost laminated. Maybe Drew Hause will chime in here.

It isn’t Laminated, but is ‘Star Damascus’, one of the more common variety. The finish is something not often seen these days, somewhat darker.

Laminated Steel barrels are rarely seen on hammerless Parkers but was the barrel steel used on later Grade 1 top action Parker hammer guns.

Legh Higgins has a hammerless Parker lower grade with Laminated Steel barrels but were not supplied by Parker. His research letter says “use cust. barrels” so apparently the guy who ordered the gun had a set from a top action hammer gun... or maybe not even from a Parker.

This is Legh's gun showing nicely patterned Laminated Steel barrels. Oddly the rib says Damascus Steel and the barrel flat is stamped with a T for Twist, but they are clearly neither.

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A feature that some will note on this gun is the lack of a bead at the radius of the frame. This would continue onto the frame from the barrels and terminate to a point after about 1/4" on the frame.
This feature was done away with on Parkers below B grade in the 1920's, however this is a 1897 gun.

Now... I have also observed other earlier guns with lack of this bead. And they always seem to be 0 frame guns.
I have always scratched my head at why the factory decided to not file in this bead on only certain frames in those earlier days.