Help me identify this tunnel

I have Lionel tunnels with the inside panels that you have and other without. Looks like there are markings on the tunnel Keystone on both entrances to the the tunnel. Can you make them out. Also what is the measured lanthanides of the tunnel?

It appears to be a Lionel prewar tunnel.  I know that both Flyer and Ives were selling fiber/paper mache tunnels during the prewar era.   

Peter, that is a tough one. It doesn't look like any of the Lionel tunnels I've ever seen, and searching Ives came up empty for me. That looks like it is one solid piece. Interesting though how it looks thick inside the tunnel and the mountains look to have a pattern you can feel the hills and such. Is it thick or medium thin?

I have Prewar Lionel tunnels, with and without the inner wall. I did a post years Bach asking about the cutouts on the bottom of the tunnel. I believe that the tunnel with the inner wall was a earlier version. All thins are the same gauge. When I get home tonight I will get them out to take some photos.

It is at the storefront......and I will re-examine it in a day or so.....thank you for all the responses.

Peter  

WOW......going on the suggestion that it is Lionel.....I searched on Google Images for "Lionel Prewar Metal Tunnel"

It is a Lionel 118 tunnel.....

Thanks to all, again!

Peter

Hmm, this post looks familiar. This one isn't filled in on the inside of the tunnel. The one you've shown Peter looks like it has a deeper inside then in the below post.

https://www.google.com/url?sa=...lTltYB_4VYm5NiVzbRb4

I was unable to look for my tunnels last night (do to other things that had to get done) but looked up a old post I did "Prewar 8 inch metal Train Tunnel question?"
The original photos were lost in the post but as I scrolled down I did find a picture of my Lionel 118 (no-lighted) tunnel.
The keystone does state Lionel in a funny type of script.

I did ask the same question about the single and double wall and what I got was that the tunnel with the inner wall was probably a earlier version and the one without the inner wall was a later version and that the inner wall ws eliminated to cut cost.

The other question that I had was with the two slots on each side of the bottom of the tunnel and what they were used for?Thought that they may be used during the painting process to hang or that there may of been a clip to connect two tunnels together?
Any thoughts?

The only other things I can think of is either popping a question on tinplate forums or contacting the Toy Train Museum to see if they have any information on variations. It would be interesting to see that sort of like some of the Marx engines and cabooses that vary during shortages due to wartime. This could be one of those very rare early versions that may not have been seen since way back before most of us were born. Be interesting too to hear the story behind it.