Groovy 70s Crocheted Black & Multicolored Granny Square‎ Afghan With Vivid Color

This 1970s era Afghan is made of is made up of granny squares that are surrounded and connected with black yarn. The colors are still bright and vivid. There are some spots where the squares are starting to come apart where they’re connected. Please see photos for examples. I did not repair this because I do not know how but perhaps you do. See pictures for approximate measurements. Reasonable offers considered.