EBBCO SEXTANT in case with manual

Ebbco Sextant in its original case. Made by East Berks Boat Company, England. Black plastic teaching instrument. Mirror and lens look to be in good condition. The filters are foggy & scratched, apart from the green one. The extract pin & screws are rusty. It's Use, Care and Adjustment by JGP Weatherlake manual is included. Definitely needs some TLC - or display as an ornament. Please email with questions or to request further photos. Thanks.