I just dug-out as many 068's etc that relate to this post
From right to left I show 2 pea green with orange painted diamond, pea green with brass diamond with and without made in USA at top, orange / brass, peacock / brass,
silver and gray with diecast (may be from a gateman) and the LL Jr type, also LL Ives and Winner, diamond is the same blank as used for the clock in this set, not same as an 068. Final one is Standard gauge size Hafner, with post and base made by Lionel, litho diamond by Hafner.