We get requests for Sterling China date codes, and the only chart I know
is in Lehner's Ency. of U.S. Marks. The odds of my being able to post a
picture are slim, but let's see:
Maybe Christensen, but studio potters from that far back who didn't
become famous are hard to ID. There's a group on facebook that might
help--Studio Pottery Identification (US).
The encrusted gold is the same as Valencia, by Tiffin; I just can't tell
if yours ever had the gold ring around the foot. See it on the
replacements site.