George S. Thompson Salt & Pepper Mill - Glass by Imperial?

Hello Board Buddies! I've got a salt shaker and a pepper mill produced by George S. Thompson Corporation of Monterrey Park, Calif. The glass looks a lot like Imperial's grape pattern but I can't seem to find any information to confirm that they are by Imperial. Does anyone know if Imperial made these inserts? The salt shaker is 3" tall and the pepper mill is 4" tall. Thanks for any information you can provide.
Don

 

Where have you looked, did you try Replacements?

 

Looks like George Thompson was a large company. So would not be surprised if they contracted with a glass company such as Imperial to make the glass inserts.

They were sold to another company and are still in business
https://www.oldethompson.com/content-page.aspx?PageID=32

 

No idea but I picked up the same set in white a couple years ago:
Also, agreed the pattern looks very much like Imperial's grape.
~

 

Thanks, Marie, yes I checked Replacements but didn't make much progress. Thanks too, cluttered, I had never heard of the company before. I wasn't sure if it was one of those fly-by-night companies or not. And thanks, aaroncab. The milk glass version you have is the only other color I could find a web search. So we've at least got green (verde) and white.
Don

 

definitely Imperial Glass #472 'The Niagara'; AKA: Vintage Grape
"R" shows them in milk Glass
https://www.replacements.com/webquote/imcvigm_s2.htm?rplSku=7645839

 

Tallcakes to the rescue! Thank you so much!
Don