About a month ago I noticed a volunteer tomato plant sprouting amongst a line of marigolds.  It held tough and even began fruiting.  Now I have some ripe tomatoes that I don't recognize.  They are somewhat square and orangey red (maybe they'll be more red if I let them ripen up a bit more.  Usually I plant sweet 100s, sungold, or yellow pear tomatoes, so these ones that popped up are a mystery to me.  Can anyone help me out with identifying the variety?  Thanks!