Probably a KS 2924
I
believe Masamoto has had san-mai KS gyutos in their catalogue for quite some time. Have a look at
this thread dating back to 2014. In that regard, I dont think it is anything new or improved
It is more a case of the clad KS knives being rare - they aren't talked about much. I assume the rarity is due to cost...The mono-steel KS knives are easier to mass manufacture - so they
aught to be cheaper (demand forces excluded) and provide Masamoto with larger margins. In fact... I don't even know if the KS29xx series are manufactured any more??
I would certainly like to hear more. I have been interested in them for a while... Wouldnt it be interesting if the 'original' KS was the clad version and the popularity of that model lead to the the development of the easier to produce, stamped mono version?? I am not saying this is what happened but it is fascinating to me that the clad version are so rare.
I am not sure if this gives you the information you are seeking? Do you have more specific questions you are after?