Digeroo,
it might well be Buffy Ball. Thanks for that.
I had already checked the squashes that this company offered and there was nothing in any way similar to what I have.
Re saddad's comment, my personal view is that the general reliability of seed suppliers has gradually been going downhill. One wonders just how much some of them do to ensure the quality of the products that they sell, particularly where the seed comes from some far and distant land. Are they simply acting as middlemen? Seemingly, my squash seed came from Japan.