London, England, and Edinburgh, Scotland, United Kingdom (Publisher)
William Ritchie & Sons, Ltd. (WR&S) was a postcard publishing company in the first decades of the twentieth century in London, England, and Edinburgh, Scotland. The firm published view postcards depicting England, Scotland, and Ireland under the "Reliable Series" name. They also published artist-signed postcards in their "Waterette" series that reproduced watercolors. Many of these were printed in New York City by the American News Company using tricolor printing.