Inverted Thumbprint Midwestern Pomona Tumbler. Tumbler has frosted swirls alternating with light honey amber stain. We believe that this was an attempt to simulate expensive Pomona glassware made by the New England Glass Company. We think that this is probably pattern glass. This tumbler was likely part of a pitcher set for a line that included other pattern pieces. Unfortunately, this rare tumbler has 2 rim flakes. (Shown in second photo, note the first photo shows the IVT's at the top of the tumbler. They are not flakes.) They are not very deep and could probably be ground smooth.  Tumbler is about  3 3/4 inches high.