I’ve done a quick search of the internet to try and fill in some of the gaps:http://www.fairy-lamp.com/Fairylamp/FairyLampDesignNumbers_All.html
is a useful page of registered designs associated with fairy lamps. Stembridge RDs 92571, 99490, and 118152 appear on the list (but not 100207 or 100208). http://fairylampforum.forumotion.com/t374-fairy-lamp-base-marked-rdno92571
has a superb 1888 advertisement showing that the footed RD 92571 dish was designed as a posy bowl holder or stand for the “Bijou” fairy type lamps (imported
[my emphasis] and sold by Stembridge. The whole assembly of posy basket, lamp cup and dome goes by the name of “The Floral Bijou illuminator (Registered)”.
An excellent photo of a complete assembly of a posy basket base plus “Bijou” lamp also clearly shows that the allover diamond pattern is common to the posy basket base, and the cup and dome of the “Bijou”lamp, that pieces came in amber glass as well as clear, and that the posy basket base came in a circular ruffled shape as well as square and tricorn.
A photo of the lamp cup of a “Bijou” lamp in blue glass is presumably a colour match for Roy’s lamp, and this photo also shows quite clearly that the base of the “Bijou” lamp was marked Rd No 92571.
Does anyone know if the lamp dome bore the RD number too?
In the 1888 advert for the Bijou Illuminator (floral or otherwise), Stembridge describe themselves as “Agents for Belgian and Bohemian Glassware”.http://www.fairy-lamp.com/Fairylamp/FairyLampUndoc481500.html
item U-498 shows a photo of an amber “Bijou lamp” in a tricorn base (like my clear example) but rigged for hanging by chains as in the 1888 advert.
“Lithophane fairy lamps (candle lamps) are truly works of art. The skill of the artist who sculptured the original mold (wax) was amazing.These are only four examples of countless different designs available. The dates on these vary but generally speaking the are from the Victorian-era (c.1888) with the exception of the "food warmer"/candle lamp on the right. It may be a bit earlier.The maker of these candle lamps is unknown. While many lithophanes are marked, these four examples are not. Many countries made lithophanes, but it seems that many/most are German in origin. The British importers, J. Stembridge & Co, referred to them as "Bijou Transparancies."
Nice advert for the Stembridge “Bijou Transparancies” athttp://www.fairy-lamp.com/Fairylamp/CatalogAds/Stembridge_1888.jpg
So, although Stembridge registered five glass designs, only once does he describe himself as a manufacturer, and certainly his adverts emphasise that he was an importer of Belgian and Bohemian glassware. He advertises imported lithophanes, but I can find no evidence to indicate their country of manufacture.