Old " NO SMOKING " Sign

Old NO SMOKING SIGN. Note it is not RED and Yellow but Black. I seem to recall back in the older days -- there were these kind of metal Signs in Grain Elevators. As back in those days Smoking was not in the Color RED for a sign -- as Smoking was more accepted. I am pretty sure this is from a Grain Elevator.

If you have other info, would be Glad to hear!

Thanks

;-)