Haig & Haig
I will see what I can find out regarding background information. As for value, try contacting Martin Green at Bonham's - his email is martin.green (at) bonhams.com Let him know Joanne from Whisky.com sent you to him. Also, keep in mind a small fee may be involved.
The brand owner of Haig & Haig is Diageo and I'm in contact with their archive manager. I will pass along these photos to them - likely they will email you directly with the information. However, we ask that you keep us all posted on what you find out!