My Granny and Granddad used to work for the Pilkingtons around the 1930s-50s? as ladies maid and chauffeur and I own the watch that belonged to the gentleman.
It is well over 100 years old [date is inscribed on the inside also something else that we have never worked out] and his initials are engraved on the front.The only two out of three letters that I can remember is E P. I will have to get the watch out of the bank to see the 3rd one
My dad always told me that they were the owners of Pilkington Glass but doing a bit of research I think it is unlikely . But they did have something to do with the business and are related to the founder