Help needed to identify old cast iron hex bolt

Hello! I found a cast iron antique(?) piece. I need help identifying the bolt. It has letters and numbers embossed on it. My research has turned up nothing. Photo attached. Thank you!

 

Soak in white vinegar to remove some of that rust - provides better detail. May only take 20/30 minutes to start seeing results.

 

I played with it a bit, as shown.....looks like there's a small letter or something between the L and P....and maybe something in front of that 8, but who knows what.... @Rayo56 has the best suggestion!!

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I did that last night. I didn't soak it because I am worried about damaging the "patina". I'll re-do it and see what I come up with! Thanks!

 

I wonder why there is no hole?

 

How long is it and what size is the bolt head?

 

I don't know if this is it but they say that theirs are all marked LB for Lewis Bolt & Nut Co. Are you looking for a replacement?

"We forge raised head marking on to almost every fastener we make. Every part will have an LB which is our registered trademark to identify fasteners that we make."

https://www.lewisbolt.com/faq

 

Interesting. Would they have a date of manufacture?

 

I don't know. It's in the piece.

 

https://www.lewisbolt.com/faq
I gave that a pretty good 'look/see' and the closest I came up with was this, which I didn't think was all that close...........

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From the look of it I would not call it patina, I would call it corrosion. JMHO

 

This is from their Facebook page with an LB on a different type. They've been in business for many decades so who knows about an older piece. You might ask them if it's theirs.

https://www.facebook.com/pg/lewisbo...um&album_id=560032744197045&ref=page_internal

 

Thanks! I just sent them a message. Someone else also mentioned them as a possibility!