The company was eventually turned round under Percy's control, aided by the introduction in 1926 of the Lister Auto-Truck, used to move goods around factories, railway stations and dockyards the world over; production continued until 1973.
As managing director Percy led the firm through a period of significant growth and prosperity in the 1920s and 1930s.
The open lid means the expiration date applies once the product is opened or the seal is removed.
The letter is usually an "M" for month or "Y" for year.
If Modern Family has run the to-the-camera confessional as connective storytelling tissue into the ground, Life In Pieces here looks poised to simply do away with the need to connect its stories at all.