Miriam, you are so smart and readable. I love when you come on here and offer advice. I guess because you've "been there done that", huh?
I tried to find out where the person lives that asked the question, but it isn't shown on her avatar. 66's are hard to find here and the ones you do find are "wore slap out" and put in the barn for the last 50 years 'til grandma or grandpa had to be put in the nursing home sale. Mostly around here you can find 201's and 15 91's. They are just as good IMHO as far as the sewing goes.