NOT ONE YOU SEE FOR SALE VERY OFTEN!
SCARCER EARLY VERSION.
You are looking at a super Ives target signal from the 1920s.
This one is the earlier version of the #331, with the white and dark green.
After this one, Ives catalogued a different color combo verison and marketed it at Standard and O both, but given the 11 inch height, it is best with Standard.
Sure to be an attention-getter in the prewar collection.
CONDTION: C6. Bench tested and both lights work. The white shows handling and use. The white MAY clean up, but I will leave that to you. The paint is worn somewhat on the pole. Die cast base is in nice shape with good dark green paint. You can still faintly see the lettering designating each post on the base.