[Zope] Is there a way to look at the "raw" data making up an object in the ZODB?

I have a suspicion that earlier version of one our my products may have set an attribute to a large value. The newer versions of the Product no longer do it, but if some of the objects are still around from previous versions, wouldn't they still have the old attribute in the ZODB? Is there a way to look at what an object looks like in the ZODB and find out what attributes it has, without knowing the name of this now-defunct attribute? I realize this question is odd, and I hope I have explained clearly enough what is I want. Let me know if I can provide any more details, John Ziniti