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3.5in Thornton PIckard Patent Time Roller Wooden Shutter for Brass Barrel Lens
This one likely made during early 1890s. First off, as you can see it is missing the string, which you pull down to set the shutter spring. In the back, there’s also a wooden recess that is 4.75in around, so you could probably also use it in a lens with that size hood.
