I have one of these. Not this exact model, but similar. The months are on a roller like the days of the week and there's no emblem.
It had been on my paternal grandfather's desk all through my childhood and I always thought it was cool. It was one of many little odds and ends I got after he passed.
I packed it away during a de-cluttering years ago. One of the legs had always been wiggly but it fully detached from the base one day and from then on it leaned to the side.
I always considered trying to fix it or get it fixed. I guess I need to do that.
Not nearly as good as some of the 'great's out there on youtube like My Mechanics. A bit of a messy job, and not a great job showing the finished product or how it works.