These fold away lorgnettes can be hung from a chain to look like a large locket. They are probably French with the original mechanism of a sliding button to open the glasses – as shown in the photo. They measure 6cms x 3cms, and the spring works well.
Ask the Dealer
I have been dealing with antiques for over 45 years. I have a special interest in medical and optical items. The earlier the better for my collection. I used to sell in Portobello Rd & Bermondsey Market, I now can be found at Newark & by appointment .