Need help on mark on vegetable dish

Hello, Can anyone help me with the mark on the underside of a vegatable dish. I always thought it was Sterling, but now looking at the mark I am not sure. I appreciate any input. Thank you, Pam
vegdish.jpg

looks like silverplate to me, have a look in the american silver section, there are marks similar to this. Without ‘sterling’ its generally classed as silverplate or ‘white metal’