Here is an antique silver plated julep strainer that is marked “R. & B. Co. A1”. This is a mark used by Rogers & Brittin, West Stratford, CT who were only in business from 1880 to 1882. It measures approximately 5 and 1/2 inches in length and the bowl measures approximately 2 and 3/4ths inches wide. It has a fluted design on the handle ( both sides) flanked by chevron shapes on either end with an aesthetic pattern within. There is a notched clover cut out at the top of the handle.
This strainer has a reverse bend handle meaning it is opposite to that commonly found on julep strainers. I have seen many clover strainers with these reverse bends with various backstamps. The strainer holes are always round (as they are on this strainer) and the cut-outs are always a clover on these reverse bends. The clover cut-out on this strainer is notched, which is unusual. I believe these strainers were made for double straining and not primarily for pouring. Please read my blog which explains my reasons for reaching this conclusion https://queenofsienna.wordpress.com/2015/07/20/julep-strainer-unusual-design/
This strainer is available for sale here at my Etsy shop: https://www.etsy.com/listing/629617794/rogers-brittin-aesthetic-julep-strainer