Address & Ph.# 4 John Hancock Mutual Life Insurance Company, want to learn what cash value is on a policy.?

I got an Insurance Policy on myself June 27,1951, I turned 21 in Sept. of that year ..it was Pd.-up on 06/30/71, It was a 20 year Payment Life. I will be 76 Friday, Sept. 29 and would like to find out what the cash value is. It is with John Hancock Mutual Life Insurance Company Boston Mass. I have no other address nor a Phone #. to contact their office. I would appreciate any help...E-mail me at Jswem@blazenet.net Thank You Janice