Yes, the catalog spec sheet says, white nickel, which I think is just nickel plating that hasn’t been polished.
So it has kind of a frosted look to it.
Although, some models in the catalog have a black stand that I think, was Parkerized.
If you’re building a Motorcyke, then White Nickel is the finish.
1917/18 got a three sided window Davis drop stand plate.
1918-21 got a four sided window Davis drop stand plate.
1918 being a transitional year, so it could of had either type.
Don’t quote me on this, because I’ve been known to be wrong in the past.
But, I’m always willing to learn.
So please feel free to correct me if this info doesn’t jive with what you’ve been told.