Yes, the stamp advertised as Japan, Scott #254 is indeed that...
1937, 10y dull violet, and postmarked on November 18, 1940...

Also, the paper is non-granite, ordinary...

I was able to just tease out the watermark. It isn't prominent at all...


It's a shame that the cancellation obscured the portraiture to that extent, but it is what it is. If only it had been stamped a little over towards the right.