Pair Small Stained-Glass, Copper Foil Lamp Shades

Went to a local flea market for the first time in well over 3 years Saturday...I've largely abstained from such temptation, since I have enough stuff already. But these caught my eye, an' I brought 'em home. I have no illusions about age; they are pretty contemporary imo, but I thought their simplicity an' the quality of their craft a bargain at their modest price, $10 for the pair. You are only seeing one, as they are identical in all respects.
My recollection of this faddish hobby is from the 70's, or perhaps a bit earlier; I never got into it, but several folks of my acquaintance, an' one sister-in-law, were deeply involved, tho' none could match the level of skill shown in these; the soldering is minimal, without any excess, an' is 'patinated' by a black treatment inside an' out, all very uniformly done. Something about the colors an' the pattern are reminiscent, to me, of Frank Lloyd Wright, but I cannot bring that into good focus.
The square is ~10 1/2", they are ~6" high, an the vented top is 2 3/4" on a side. Each side has 22 pieces; the darker triangles have an iridescent sheen, an' the short dark rectangles in the stripe that separates the skirt border are a rich amber. Is there anything here that harkens to a higher, perhaps borrowed, design? I welcome your comments; Thanks for lookin'!

 

talented amateur , at the least.
they don't look to be copper foiled , so not the Tiffany style..

a 10 for the pair......... not bad at all !!!

 

They aren't channeled lead...If not copper, then what, Komo? I profess ignorance aplenty about this.

 

copper foil used under the lead channel......
look closely at yours for the signs of this foil.....where the lead is thin, or disturbed...