Your bouillon cups are by a porcelain factory in Limoges, France and imported into the USA by Lazarus (not Lewis), Straus & Sons of New York. NY. The firm was in operation 1895-1925. Your cups were imported for the department store Mannheimer Bros of St Paul, Minnesota.
From my research I was able to determine the retail value of your exquisite set would be $600-700 assuming good condition.
If you would like to sell close to retail , some ideas are:
The internet has your largest audience of buyers. Place small ads on these sites or set up your own small store on these sites.
Etsy.com - no or small fees
Goantiques.com - more upscale fee based
Rubylane.com - more upscale fee based
Amazon Marketplace: http://services.amazon.com/content/sell-on-amazon.htm/ref=footer_soa?ld=AZFSSOA
Another method that could be very effective would be to place a classified in the "Maine Antique Digest" It has a large readership of collectors all across the country.
A private seller to a dealer can expect 30-60% of retail value if you choose to sell to a dealer.
I hope I have helped you.
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