Right, because leather isn’t a good wearing surface? Darn, tell that to people who use it to sole shoes. Only been doing that for thousands of years.

Yes, that is exactly what I think when I see the interior of a car in leather, interior made of poo.

If I was into leather I might do this, I’m not.

On the other hand if they would pay me $xxx for it I could make it out of cream or brown leather and use a woodburning kit to “brand” the keys, a trick that these folks sorely missed.

As for a black one, I could easily use glue and an old (or torn) jacket to re-create this.

If you wanted to mass-produce this as a retrofit you could use jig to clamp all the keys and use a mill to cut them all down at once, then just glue and go! Maybe a leather die to shape and cut the leather in one go, so the gluing process would go quickly.

The manufacture of this keyboard would be interesting to me, as would the money paid me for making them. I don’t think there is much of a market though.

This looks like something you could easily do yourself with a bit of patience, an old keyboard, and some decent glue. And maybe a file to widen the gaps between keys if your leather is too thick.

I prefer that:
http://www.pinktentacle.com/2007/10/diy-wooden-keyboard-kit/