Notice there are no handle pins in that first knife. The bolsters and those overlapping liners held the handle slabs in place.
Bernard Levine discussed these knives in two or three successive Whut-Izzit columns in KnifeWorld several years ago.
It was a Robeson patented technique, probably designed by James Lewis.
Problem is, that particular handle material will shrink and eventually pull away from the retaining nickel-silver bolsters and liners.
Here's my example of the technique on a different knife: