Bowmar

I don't think it's well-remembered, but Bowmar was the biggest calculator company in the mid-70's. The were early to the market with 4-bangers and held lead market share for years, providing a lot of power at price points lower than the "premiere" calculators sold by HP and TI.

Bowmar MX100

This was the 2nd calculator I ever owned. I remember using it in college and grad school.

It's in nice condition, fully functional.