W.Pepys most likely from mid 19th century. Scales made from "I" material. Images below - Veterinary fleam by the same manufacturer.
http://traskrom.users.photofile.ru/p.../130687489.jpg
http://traskrom.users.photofile.ru/p.../130687504.jpg
http://traskrom.users.photofile.ru/p.../130687493.jpg