Charles E. Henn spongeware mugs

These mugs are about 3.5" high x 3.25" across, not including the handle. They were made by the Gerald E. Henn Company of Roseville, Ohio. I was surprised to not find any examples of pottery from this maker on CW. This was a commercial pottery that seems to have closed about ten years ago (2009). I had never heard of them. I am still collecting American made diner mugs and these are very heavy, solid mugs made in the US of A. I found four of these, two blue and two pink, at a local thrift shop for $.99 each. There are three different sets of initials on these four mugs, probably representing the potters who made them. The mark on the bottom says freezer, oven, microwave and dishwasher safe. Apparently there is a lot of new old stock out in the wild and pieces by this maker are selling briskly on the on line auction sites. Maybe a little too briskly, based on some reading I did. Not sure if there was really a Gerald E. Henn and some pottery is apparently marked Waterford, Ohio, instead of Roseville, Ohio. Hard to find much information about this pottery but it seems to be good stuff, from a durability and design perspective.

https://www.harryrinker.com/col-1299.html