Wedding Ring Reversible Mug Rug

This is an adaptation of the traditional wedding ring block pattern into a mug rug! It is a wedding anniversary gift for my sister-in-law and her husband of 47 years.

I wanted to make the mug rug reversible, and this is a picture of the back.

I foundation pieced two wedding rings, about 10″ outer diameter. The centre circles have a flannel insert. I discovered that I had made a miscalculation, and these were half an inch too big! Nothing could be done now, so I slip-stitched them by hand to the interlaced wedding rings, taking the excess fabric to the back.
With no access to a sewing machine, I decided to hand quilt them. I quite like the extra personal touch the hand quilting gives to the gift:-)
It so happens that the monthly challenge on my quilt forum Desi Quilters for July 2012 is monochromatic quilts! So this could be my entry for the challenge.

Here is a closer look at the mug rug:

And of the back!