Brand: Royal Sovereign Pencil Co.
Made in: England
The oldest pencil at the top is believed to be manufactured by E. Wolff and Sons. It is my understanding that 3 pencil factories merged into what is known as the Royal Sovereign Pencil Co.
Thus you will see Royal Sovereign pencils marked Arthur Johnson's & E. Wolff's and Son.
Founded in 1919, the company was formed as a collaboration between two British pencil manufacturers: The House of Arthur Johnson (est. 1803) and E. Wolff & Son (est. 1796). Many Royal Sovereign pencils bare the mark of Arthur Johnson, and if so will have “Made by The Royal Sov.” imprinted on the reverse of the pencil. Royal Sovereign was acquired by Staedtler in the late 1980s.