My great-grandfather, Icek-Hersz Grynberg, had a shoe shop in Lodz pre-WWII. Attached to the shop was apparently a factory and warehouse where the shoes were assembled, and people worked piecemeal at their homes to prepare the leather. My grandfather had said once that the shop was located "near the main section of the city, near the boulevard where the elegant shops were."
Does anyone know where he might have talked about or where I can find documents about his business? I am curious to learn if there are any ads for or images of the shop/factory/warehouse.