Here is a silver plated julep strainer marked “Edward Rorke & Co. 4 – *” measuring approximately 5 and 1/2 inches long and 2 and 3/4 inches wide. Edward Rorke & Co. was a wholesale and importing crockery house; importers of earthenware and china and manufacturers of lamps and glassware. They were located at 40 Barkley St., New York City in the mid to late 1800s.
I believe this strainer was manufactured for Edward Rorke by L. Boardman & Son of East Haddam, CT. This photo was taken on a page from the Boardman catalog showing this strainer. The mark “4 – *” is also a characteristic of Boardman.
Luther Boardman had been in business for a couple of decades when he went into partnership with his son, Norman, in 1863 in East Haddam, Connecticut. You can see a similar strainer as this one illustrated in an 1889 Boardman ad which can be found here in my blog post: http://queenofsienna.wordpress.com/2013/03/25/l-boardman-son/
You might also find my blog post on The Victorian Bar interesting as well: http://queenofsienna.wordpress.com/2013/06/29/the-victorian-bar/