need help identifying mark

Can anyone help me identify these two marks on an 800 silver tray? I will try to add photos, but not sure how. One mark is a capital L with a star on top, but laying on its side within a rounded cornered square. The other mark is cursive initials that look like FMS The silver piece is all hand hammered design and is very old. Possibly from late 18th century.
s227.photobucket.com/user/js1622 … a.jpg.html
s227.photobucket.com/user/js1622 … e.jpg.html