Dear Bill,

You are in principle right and I fell in my own trap!. In practice though, Bubingas and Ovan(g)kols can sometimes be so similar in appearance, due to the natural variability of the wood and being also in the same genus as you describe, that is can be very difficult to distinguish them. I think mine is probably Ovankol but, in trying to distinguish these species in forensic work against known reference specimens, I've found it can be almost impossible!

Very best regards,

mooman