Monroe litton 1880 Early 70s Vintage Programmable Electronic Calculator Works!

Description

I reserve the right to end this auction if no bids are received within the last 24 hours.
Fully functional and very good (no cracks or visible scratches) cosmetic condition. This is the top of the line Monroe scientific programmable calculator for its time. It comes with built-in surveying package and associated special keyboard. Tested all basic and scientific functions and they all work. Not sure how to test the survey related keys. Can also perform hyperbolic functions and their inverse.
The printer works perfectly (a bit loud). Even the card reader is functional: the calculator sucks in the card when inserted in the reader slot and returns it back. Did not test the programming abilities lately. However, the lucky buyer will have a chance to do that. Lot comes with a programming manual and one magnetic program card as shown.
I posted a video 6 years ago of this calculator in action:
https://youtu.be/XI6wVg_UeZE
(Unfortunately, I have misplaced the magnetic card with that specific program).
I might be listing few more very rare and vintage electronic calculators (trying to thin my collection due to retirement) so you might want to check my auctions every now and then.
Heavy item that I will make sure to package securely so it can make the shipping trip.
Read more a out this wonderful machine; oldcalculatormuseum.com/m-m1880o.html