Dumpster dived, meaning stuff around the shop and used before, but not something normally used. C is either in the name or refers to carbon. Although "different" from a dumpster dive COULD be differentially heat treated SR101 as mentioned earlier.

So it's either 154CM or dif treated SR101.

But it lacks an orange handle. That project will be coming later.

Here's hoping for a dif heat treated 11-11 in all black or satin or comp finish