Well as your article said Conta & Boehme did,`t mark their items untill late 1870`s !! So yours must date after that !! I think they started in the 2000 numbers and yours is 8386 so I am betting yours is from the 1920`s or early 30`s !! The figure itself would be of that era !! You see many from that time period from different makers that are similar !!