VIsta Family of Mutual Funds later became Chase Vista Funds
In 2001 it then became JP Morgan Funds
I would suggest trying to contact JPMorgan Funds. This company ca be found on the web at www.jpmorganfunds.com
The name Delco International, Ltd is a British manufacturer of silverware and tableware. I'm not sure how that fits in.
Did you check with JP Morgan Chase to see if the cetificates are worth anything?