Pictured is an antique silver plated julep strainer that is marked “1877 Niagara Falls Silver Co.” which is a hallmark of Oneida. This strainer measures 6 and 1/2 inches in length and the bowl measures approximately 2 and 7/8ths inches wide.
There is an acorn figure cutout on the handle. The acorn was used as a logo by I. W. Harper Whiskey (Bernheim Distilling, Louisville, KY) and it is possible that this strainer is associated with them. I also have a toddy strainer for sale marked “Old Harper Whisky” and that, too, has another Oneida backstamp.
To read more about Old Harper please see this blog post: http://queenofsienna.wordpress.com/2014/02/23/the-old-harper-whisky-toddy-strainer/
Also, please see my blog post “The Victorian Bar” to read more about cocktail strainers in general: