Glassies: Challenge for the day. Unidentified iridescent Old Fashioned

Ok folks. I'm having a little difficulty pinning down any info on this iridescent old fashioned glass tumbler. It has 12 panels with textured sides. I have 10 of these. 3 1/4" tall x 3" across. Any help would be appreciated. Thank you.

 

Is that real irridescence or did someone stick them in a dishwasher?

 

Real. I think I just found them
Vintage Hammered Moon-Glow Lustre Dodecagon Tumblers: Federal Glass– Lollygag.co

 

hmmm, I wonder if someone was key word spamming on that listing. I'm finding many Federal Glass patterns with iridescence being called moonglow. Their Yorktowne, Petal and the milk glass tavern tankards and the only actual Moonglow pattern that I can find are white

 

It looks like Serpentine is the correct pattern name
GORGEOUS rare Set of 4 fourfederal Glass Serpentine - Etsy Sold for $88
2 Federal Glass RARE Iridescent Serpentine Double Old Fashioned Whiskey Glasses | eBay Sold for $22.79

 

not finding anything to corroborate a Federal attribution or anyone else. but am finding various sizes including tumblers and juice. also finding pitchers

Vintage Heavy Thick Green Depression Glass Pitcher Water Beer Texture Panel Bar | #1962656036 (worthpoint.com)

Full Sized Carnival Glass Paneled & Textured Pitcher - Clear and Iridescent | #1793168033 (worthpoint.com)

 

Thanks for checking Don.