Mutual Trust is now Met Life, and they are actively redeeming these policies. If you have death certificates and sundry other proofs, which they list, they will pay up on the policy. Be sure to check their website for more information.
If you owned the policy issued by the Hartford, simply contact that company for a copy of it. If they are unable to find any record in their database, then you're out of luck and the policy is likely...
Beneficiary information is privately held by the owner of the policy. The only way you can find out is to ask that person. The company would be seriously violating privacy laws to give you this...