Art pottery creamer

This little creamer is 3" long x 2.5" high x 2.5" wide. It is signed on the bottom "SL" (or 75?). Probably another pottery class project but a very pretty one. I do not know when and where I found this, probably a thrift shop, though there is a very slight chance that I purchased it at an art fair or art walk. Guessing I have had it for 10-15 years. I just happened to be looking at something in one of my china cabinets and spotted the spout of it peeking out of a vase that I had tucked it into. No doubt it is American. No idea who/when/where it was made.