Pottery 'Coconut' Shaped Bowl or Vase

I need some help trying to identify this cool vintage pottery rose bowl or round vase. The surface is textured in such a way that it reminds me of a coconut. As you can see it has a brown glaze with soft gray highlights as well as some of the white clay body showing thru. The interior is glazed in white and the bottom is glazed the same as the body. At first it didn't look like it was marked but once I took a photo of the bottom it appears that perhaps it is, though I can not make head or tails of it. I tried adjusting contrast, light, dark etc., on a copy of it to see if the mark would sharpen up enough to read it but nothing so far.

I was hoping that someone might recognize the shape or have a piece with a more distinct and readable mark on the bottom. This piece measures about 4" high x 4.25" across. As always, thank you in advance for looking and hopefully some one may recognize it.