Best anyone can do is guess. As we often discuss here there are literally 100's (and in some cases 1000's) of varieties that each look the same. Most folks simply don't realize how many varieties of tomatoes there really are in most any color, shape, or weight/size category. ;-)

For example, green-when-ripe has some 150 varieties listed on most tomatobases and the red-orage bicolors, even more.

The only way to effectively narrow the number down is by leaf type but even that leaves 40-50 choices as possibilities.

Dave