UNITREX 80SR Rare Vintage Calculator RED LED Mini Handy JAPAN W/Case Estate

UNITREX 80SR Rare Vintage Calculator RED LED Mini Handy JAPAN W/Case.
Please refer to each of the photographs provided as our pictures are always an important part of our descriptions. I did put batteries in and turned it on but I did not test it further. Note that I have also included a photo of the battery case and there is a prong that has some battery acid on it.