Mrs. Stewart's Bluing

[canvaslady]

Found this bottle (unopened at a yard sale) for 25 cents. Is the bottle blue or is it just the stuff inside that makes it seem that way? On the bottom it has a No. 7 then an I or 1 in a circle and next to it is what looks like 35. Does that tell the age. Any input would be great.
Went to an Antiques Roadshow type event yesterday in town, meant to bring it but forgot. I did however get an oil painting appraised that I paid $1.00 for and it appraised for several thousand. Yeah!!!! Gonna sell it. Love them yard sales..........

 

[Digswithstick]

Base looks clear ,great buy on the painting who was artist, if you don't mind me asking ?

 

[capsoda]

I have a smaller bottle of Mrs Stewart's Bluing. It has a black Bakelite lid. The content is blue. The I in a circle is the factory mark for Owen- Illinois Glass Factory.

Could you show us the picture.