Please help identify - 60's/70's ceramic?

Hi Guys -

I'm new here and hoping for some help identifying who made this coffee mug.  I bought it off ebay a few years ago but since then have had two kids and am slightly braindead.  :)  I remember reading about this type of pottery in a design magazine of someone who had collected it so I know it is 'something' and not just a thrift store standard.

There is only a pin prick casting mark on the bottom - no stamps or names.  It is a lightweight ceramic/pottery.  Design is a relief. Mug is a little over 4 inches tall and about 2 1/4 across on the bottom where it is widest.







Thank you for any help you can provide!

Edited to add two additional photos and dimensions.

Hi, and welcome to the site, Kelly.

Interesting mug. It always helps to see a photo of the base, regardless of whether there's a mark or not.

Thank you for looking! Of course, just added some additional pictures and the dimensions.