Vintage HP 80 Hewlett Packard Calculator w/ Power Adapter, Case

Description

Estate find
Appears to work.
Performed some simple calculations- I don’t really know how it works.
I didn’t test the battery pack with it, only the power adaptor.
You may need a new battery as it shows slight signs of corrosion
Comes with all that you see
Case leather covering peeling in places
Vintage HP 80 Hewlett Packard Calculator w/ Power Adapter, Case. Condition is "Used". Shipped with USPS Priority Mail.