Need Help w/ Colorful Crochet Bed Spread

hi everyone. i found this piece last week and finally was able to take some pictures at a place i have access to with room to lay it out and shoot it properly. I believe this is crochet(but i'm not sure). also, i think the yarns are cotton, but again, not sure. it measures 84" x 90" approximately. i think it's an eyedazzler. what i would like to find out is, it's approximate age? i'm assuming this is probably from the last 50 or 60 years, but i don't know for sure. also, i would really like some feedback as to how much time it would take to make one of those squares? there's a total of 210 squares that measure 6" x 6". i would love to come up with an approximate number of hours that went into making this. also, is there a specific name for this design? a specific name for the type of crochet work? really any information someone with knowledge in crochet has to offer will be greatly appreciated...thanks

 

Beautiful piece. I can only imagine the hours and hours.. Hopefully a knowledgeable member can give you ballpark estimate.

 

Boy, that was a lot of work. It's crochet but don't know the pattern names. And it does appear to be made of cotton. From the colors, I'd think 1960s but not all the thread appears to be from the same period. By an older hand, of course.

Debora