Hello, my name is Alejandro Morán and I'm writting this email from Spain. Me and my family have found an item from Ross London within my grandfather stuff and we were interested about it's origin, I was thinking that you could help us in identifying it, if that's not a problem for you. I guess it's some kind of single-eye prismatic but not sure if it is a part of a bigger object or it is just that. I have attached a few pictures of it. Does this item have some value nowadays? it is something that people use to have in their collections? Thanks a lot in advance for your help! Kind regards, Alejandro Morán.

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I don't know very much about the item but I know that my grand father was living in London during 1950-1960 and he did like to visit antiques stands in local markets.