Please help me identify a Hallmark

Hi, i have an old silver looking bowl with handles. The hallmark on the bottom is shaped like a football and says Forbes across the top and across the bottom has S.P. CO. and the ID # 206U right underneith that. I cant find this anywhere on any website. It has passed a silver acid test but feels like aluminum. Can anyone on this website tell me what this is? thank you and I greatly appreciate your help.