Originally Posted by Tatyana Dianova
the blade is made of twisted-core pattern-welded steel.
Twisted core / Turkish ribbon steel is made from rods of steel welded together, the pattern runs with the blade as far as I know, I am not sure that your blade is actually twisted core, see the example comparison below, twisted core Turkish ribbon yatagan and your pattern welded blade. Some other opinions? Pattern welded blades go back as far as viking swords