yum..coconut cake..

Does anyone know how to interpret silver marks? I googled but didn't unscramble it. I picked up a couple of nice teapot/creamer pieces yesterday and am polishing up for resale at a flea market. I don't expect to get rich but it would help. Anyway, says Sheffield, Made in USA. Other marks are 2822 and Apollo and BBS or BB5. I think Apollo is often nickle silverplate. Does anyone know?