Very long post caution

but only because I've added a lot of links (all to signed/marked or labelled pieces only) at the bottom
There were many other items but not marked so I didn't include them. None matched the same acid etched background as mine or the decoration either, and many were wrongly id'd as far as I could see matching them to id'd signed/marked or labelled pieces.
Thanks Mike and Ivo
Mike, from what you’ve said, and from what I’ve seen I can see they are very hard to pin down.
I can understand that Riedel might have supplied other makers with ‘blanks’ because they had a period, again from what I read, where lighting of various sorts was a major focus for the company.
But it’s a strange thing, I’ve looked at countless versions of cameo (goblets, ewers, vases etc.) with acid etched background, from VSL, Baccarat and Saint-Louis and none of them matched or even ‘felt’ quite right. None matched the design spirit, or the design or the acid etched background, or even the way it has the intricate edges and cutting on the flowers. I couldn’t put my finger on it but I didn’t post a request for id before now because I’d just not found anything that was a viable comparison…until I stumbled on the Riedel cameo pieces. The way the design is laid out on the shade, the symmetry of the design, the way it is executed and cut, and the gilding even, just has so many more similarities with the Riedel pieces than any of the three above.
I’ve attached links to many varieties from St-Louis, Val St Lambert and Baccarat – none match in any way.
I can’t see the backgrounds on your pieces on your site (gorgeous as always!) but those are the ones that have the same spirit of design as my vase.
http://www.manddmoir.co.uk/phdi/p1.nsf/supppages/moir?opendocument&part=11Harrach also did have some vases with this patterned acid etched background (pages 326/327 Harrach From Neuwelt to the Whole World) and some of the pieces on Gilded Curio have similarities with the cutting intricacy, but again, none are quite right or match the background .
I’ve added some different pics of the faceted knop on the bottom of the shade just for interest and one showing better the gilding.
Also for further resources links below to comparisons to evidence my comments above.
As a start point, my heart is saying Riedel at the moment

M

Just some examples for others to compare (obviously this is just a very small sample but they are representative of the signed or marked pieces I’ve found so far):
- Marked Val St Lambert acid etched background, one ‘flat’ layer of cameo in blue
http://www.rubylane.com/item/649246-CG-119/C-1910-Signed-Val-Sthttp://www.liveauctioneers.com/item/4974412http://www.antiquehelper.com/item/303183http://www.antiquehelper.com/auctionimages/23302.jpghttp://www.burchardgalleries.com/auctions/2011/dec1111/01images/l165.htmhttp://www.antiquehelper.com/auctionimages/23303.jpghttp://www.invaluable.com/auction-lot/pair-of-val-st.-lambert-cameo-glass-vases.-the-48-c-715c15198eFlat smooth acid etched background marked Val St Lambert:
http://www.nealauction.com/archive/0404/lot/lottext/0201-0300/0274.htmlhttp://www.worthpoint.com/worthopedia/cameo-vase-signed-val-st-lambert-1900-219056277Unmarked being sold as Val St Lambert (possibly St Louis ? ):
http://www.trocadero.com/stores/Suzanne/items/1162622/item1162622.html- Marked Saint-Louis has an acid etched design background and the similar, flat, one layer cameo with gilding
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http://www.liveauctioneers.com/item/10727983_french-st-louis-cameo-glass-vase-
http://www.liveauctioneers.com/item/5292140http://www.liveauctioneers.com/item/10727983_french-st-louis-cameo-glass-vasehttp://www.liveauctioneers.com/item/8224747http://www.liveauctioneers.com/item/20717568_a-st-louis-cameo-glass-vase-height-8-12-incheshttp://www.liveauctioneers.com/item/5715075http://www.liveauctioneers.com/item/422677http://www.liveauctioneers.com/item/1010674- Marked Saint-Louis but only one colour over textured acid etched backround
http://www.liveauctioneers.com/item/20931938_french-st-louis-vaseline-cameo-glass-biscuit-jar- Marked Saint-Louis vase one layer over acid etched background, floral gilded.
http://www.liveauctioneers.com/item/8224747- Cameo signed shade Saint-Louis – acid cut back half moons as per the vase above
http://www.collectorsweekly.com/stories/55884-a-st-louis-art-nouveau-double-overlay-ctwo more Saint-Louis shades – both have different backgrounds – not the same as mine
http://www.collectorsweekly.com/stories/83757-saint-louis-acid-etched-lampshade- These are marked Baccarat
http://www.liveauctioneers.com/item/2440138http://www.liveauctioneers.com/item/5872193http://www.liveauctioneers.com/item/19936322_rare-antique-baccarat-acid-ground-cameo-glass-vaseshttp://www.bonhams.com/auctions/15423/lot/3535/http://eliseabramsantiques.com/glass/vases-tazzas-compotes/pair-baccarat-vases-pink-and-green-cameo-decorationhttp://www.liveauctioneers.com/item/6869590http://www.liveauctioneers.com/item/10311877http://www.liveauctioneers.com/item/16473360_early-baccarat-acid-ground-cameo-glass-vasehttp://www.liveauctioneers.com/item/9641997Baccarat with paper label
http://www.liveauctioneers.com/item/22480477_baccarat-cameo-glass-and-bronze-vase-with-floralhttp://www.liveauctioneers.com/item/8599609http://www.liveauctioneers.com/item/5090872http://www.liveauctioneers.com/item/8016963Apparently marked to inside of lid but hard to read the mark on the metal
http://www.liveauctioneers.com/item/20885505_rare-and-unusual-baccarat-cameo-glass-biscuit-barrelBaccarat biscuit barrel and matching catalogue item
http://www.rubylane.com/item/1025844-Prf-Btl-75/Antique-French-Baccarat-crystal-glasshttps://www.pinterest.com/pin/233061349439710401/This were sold as Baccarat but seemed to only be marked ‘Depose’
http://www.liveauctioneers.com/item/10186520sold as Riedel - unmarked showing a variety of similar design features –Riedel was not marked as far as I know.
http://www.liveauctioneers.com/item/4985288not possible to see the background texture on these
http://www.liveauctioneers.com/item/5373557Different kind of glass but has the symmetry in design
http://www.invaluable.com/catalog/viewLot.cfm?afRedir=true&lotRef=a82e724b5b&scp=c&ri=501selling as VSL but actually signed Val and I think this might be Verrerie d’art Lorraine not VSL. I thought I’d include it has it has some similarities in that it is one colour flat polished cameo and the gilding and design has (very vague) similarities.
http://www.rubylane.com/item/649246-CG-116/C-1910-Val-St-Lambert?utm_source=thefind&utm_medium=productfeed