Karl Gustav Johanson Lundell. Born in 1833 in Loppi, Finland. Died 1856.
He has been mistaken as a head workmaster at Fabergé in Odessa. New research by Ulla Tillander-Godenhielm has proved, that the mark ГЛ (GL in Russian Cyrillic) is by an unknown master. Karl Gustav Johanson Lundell never lived in Odessa nor he was a goldsmith or a master.
References
H.C. Bainbridge, Peter Carl Fabergé: Goldsmith and Jeweller to the Russian Imperial Court (1966) G.von Habsburg-Lothringen & A.von Solodkoff, Fabergé - Court Jeweler to the Tsars (1979) Ulla Tillander-Godenhielm, Fabergén suomalaiset mestarit (Fabergé's Finnish masters) (2011), p. 261.