The Morgan Aero 8 series 1 didn't have a full length dash and therefore, there was a small, recessed, shelf in front of the passenger seat. Morgan supplied a small Mullbery bag, aka a glove box you could take with you, to fit on this shelf. Many of the Aero S1s have lost these over the years and therefore, it is a nice piece of history to have with the car.
My S3 came with a Mulberry bag - was it not a standard option for the later models as well? The dealer did say it was meant to slide in as a glove box but it doesn't actually fit...maybe that's the reason why!