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I don't know. I never measure the temperature. I heat the oil with a red hot piece of steel so that it is nice and runny.

Here is the blade as it turned out.
http://straightrazorpalace.com/custom-builts-restorations/118928-saved-blade-suminagashi-predator-patriot-kirinite-red-white-blue.html

All in all I am pretty...

The edge was thinner than that :)
For steel like this, oil quenching is already borderline not fast enough, so if the edge gets dark before you hit the quench, there is no hope of getting a hardened...

It won't be the same hardness in any case, since suminagashi steel has sides of mild steel with thin contrast layers.

Now, let's say that the razor started to drop from 50 cm above the surface....

I was working on a suminagashi blade that hadn't hardened properly along the edge. The reason was I had ground it too thin, and even with the oil tank right next to the forge, I could not get the...