Hello all!
I have just acquired my first Lionel trains and am working on building my set. One of the trains is a prewar Lionel Lines No. 257. While cleaning it up I noticed something unusual that I haven’t seen on any other example. The back right wheel is solid metal unlike the other three which have spokes. I will attach a picture to show. Is this normal or was the wheel replaced? Why would only this one be solid? Thank y’all for your time! I’m new to the forum so I hope this post is correct. Any insight y’all have would be great!

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