Bought for about $2 at Goodwill, the Sharp Elsimate EL-326 from 1981 is one of my most recent acquisitions in vintage technology. By today's standards, it is a basic solar-powered four-function calculator with memory, percentages, and square root. It came with a wallet, which I've taken the calculator out of for the sake of this photo.

Next to it is a Sharp Elsimate EL-326A from 1984, which has all of the same functions as above, plus the ability to toggle between positive and negative numbers. It too came with a wallet, which was also omitted for the sake of the photo. I have had the EL-326A since 2005; I acquired it after my grandfather passed away, and I believe he used it more than the Lloyd's/Lloytron Accumatic 308 VFD calculator that he also owned.

Both the EL-326 and EL-326A have polarizers that are not fused to the LCD, meaning one only has to take the calculator apart and flip the polarizer if they wanted an inverted display. While not entirely practical, the inverted display does give a pretty neat aesthetic.

An interesting trick that I learned on some of the calculators I used in grade school in the 1990s, is that the EL-326 can be turned off by holding down Multiply and Divide keys and pressing ON/C.; unfortunately, this trick does not apply to the EL-326A. The trick also may or may not work on other four-function calculators, whether it's solar-only, battery-only, or dual power; I tried it on my Casio SL-100L "Dual Leaf" foldable calculator, and it does indeed work. If you have a basic four-function calculator, feel free give the trick a try.