Friday mystery object #505

This week I have a specimen for you to identify that often crops up as an enquiry for museum folks: I suspect that some of you will recognise this, so let’s hear your best cryptic clues as to the identity!

Friday mystery object #505
This week I have a specimen for you to identify that often crops up as an enquiry for museum folks: I suspect that some of you will recognise this, so let’s hear your best cryptic clues as to the identity!