I have not had a chance to go get the set yet. I have not looked at it for probably 10 years. The set box, as I remember, has a yellow cover with blue graphics and lettering. It came with a small lithographed train station and three tin passenger cars with brown roofs. I have also seen these cars with Ives lettering.
I'm thinking the engine may have been re-wheeled at some point (or maybe re-motored). The reason is that I went on Ebay and looked at pictures of the 1688. Mine is definitely not a 1688, but it has the same spacer and hex head screw for the side rod as the photos show on the 1688. Wheels look similar, also. Olsen's does show the screw and spacer for the 1688. I'm guessing Lionel did not do this, but who knows. I may have a 1681 with a 1688 motor.
