Thank you for showing these, Crocus.
I can't find any other photos of Defries fairy / candle lamps.
Presumably 'P.P.' is Patent Pending.
Unfortunately, with a the exceptions of RD 360486, & 360487 (discussed recently) and RD 378997 of March 1882 - the subjects of the Defries glass design registrations from 1864 right through to their final design registration in 1883 are not given in the online registration summaries at The National Archives (see topic reply #11), so I'm not able to tell which designs may have been for fairy lights or candle lamps,
By the way, I've just unearthed a few more facts about Defries:
The Defries Lamp and Oil Company Ltd. was the subject of liquidation proceedings some time between 1889 and 1893, and Wanzer & Defries Patent Safety Lamp Manufacturing Co Ltd. (the first occupants of the newly-developed 101, Farringdon Road, London, in 1887) was the subject of winding-up proceedings in 1892.
Richard Mott Wanzer was born in America in 1818. In 1860 he began to manufacture of sewing machines in Hamilton, Ontario - the first sewing machines made in Canada. However, increased competition from American manufacturers, poor tariff protection, overproduction, and a sharp drop in demand during the depression of the 1880s severely damaged the company. In the mid-1880s, in order to raise funds to bolster his business, he joined with Robert Hitchcock to manufacture a range of Mechanical Kerosene Lamps which used a concealed clockwork motor in the base to turn a fan in order to maintain a continuous flow of air between the wick tube and the draft deflector of the burner; chimneys were not required with these lamps. Wanzer mechanical lamps were made in Hamilton, Ontario, Canada, from 1886 to 1900 by the Wanzer Lamp Co., and it appears that the Wanzer & Defries lamps were 'London' made/sold variants. None of Wanzer’s subsequent ventures – the lamp company, a soap factory, or the Oneida Lamp Company in Niagara Falls – proved successful. In 1898 a financially ruined Wanzer left Hamilton for Buffalo, planning to open the Wanzer Lamp and Cooker Company there. He died of pneumonia in New York City on 23 March 1900.
Despite the winding-up of the Lamp and Oil companies, J. Defries & Sons were still trading from 146 & 147 Houndsditch, London, in 1903. See:
http://www.gracesguide.co.uk/J._Defries_and_SonsFred.