English Shefield Silverplate Tea Caddy with two compartments with lids hinged in the middle. Both have locking mechanisms that work by turning the posts on top. There is a pattern on the sides and it is not monogrammed.
The mark on the bottom appears to be Aladdins lamp with a highly stylized 'S' above. I was not able to find the mark in my references.
The caddy is in good shape with loss of silver at points of wear.