Moro Kris with Twist Core

[George]

Hello all. I've been reading the forum for some time now and decided to post a few photos of a Moro Kris I have that has a center section of twist core. The knowledge that has gathered here is a source that is unquestionably invaluable. Any information pertaining to the origin of this type of sword would be greatly appreciated.

The details are:
Overall Length: 26 1/2 ”
Blade Length: 21 5/8 ”
Blade Width: 1 1/8 “
Blade Thickness @ gangya: 1/2 “
Scabbard Length: 23 7/8 “

As quoted by a good friend:
"The straight double edged blade forged with a peripheral “mantle” of hard, lamellar steel flanking two rows of twisted cores in a very regular and controlled pattern. The cores are deeply etched to create a visual effect governed more by topography than by color contrast. The junction between the edge mantle and the central cores is defined by an inlay of copper/silver alloy, the design terminating in a stylized “serpent head” motif near the tip."

Thanks for any help.