Sony Electret ECM-19B Condenser Microphone With Boxes UNUSED UNTESTED Vintage

Just found this Sony ECM-19B microphone in a box as we prepare to move to warmer and less taxed climes. I never used it. In fact, not even sure how we came to own it. IT IS UNTESTED. I have taken photos of all the pieces that are in the box (I am assuming it is complete). The battery was NOT stored in the mic, though I am guessing after all these years it has no charge. Please look at all the photos and make your own determination as to condition and completeness (is that even a word?). Please ask any questions before you buy. I try to describe everything the best I can. Thanks for stopping by and taking a look.