There are a variety of Wallace marks and I was wondering if anyone had any information about which mark was used during what time frame. Here is a link for a list of the Wallace marks:
Your mark is that of R.W. Wallace & Sons, which became Wallace Silversmiths in 1956. Your mark was used on sterling items in about 1897. Wallace did not use “date marks” as did a few of the American makers of the late 19th and early 20th centuries so some guesswork is necessary.