HW&Co help - knives & forks

Would you kindly let me know if you can identify these markings? I have service for 18 and no other information other than they belonged to my grandmother. Thank you!

Your knives and forks are electroplated. HW&Co and the crossed-keys are both marks used by Henry Wilkinson & Co of Sheffield and HB&H is Harrison Brothers & Howson, also of Sheffield.


Is there any indication of a time period? Thank you.

No, none at all. Best guess is last part of 19th century / first part of 20th century.