Hi ~ welcome to the forums.
Your sugar & cream set may have been part of tea or coffee service, but they were just as likely to have been sold as 2-piece set, still a popular way to market them (pieces of larger sets were usually available separately). By style, your set most likely dates to right around the 1910s-20s, produced by Meriden as an International Silver factory - my Meriden catalogs date well before their move into production of sterling, but the clip below shows a somewhat similar set in a 1916 Wallace catalog (the pricing shows individual price, presentation case price and the total).
~Cheryl
