Help 1959 Lincoln Cent D Over D?

My guess is Die chip in the B of LIBERTY and die wear on the D. The reason I say die wear instead of die doubling is I see no evidence of separation or notching where there should be. The metal associated with the doubling also has a very gradual incline over its spread which I would think results from die wear. I would expect a much more sharp if not vertical incline for a true repunched mint mark - especially as it enters the field.

coppercoins - I would expect that if the coin was repunched with the mintmark twice to the south, that you would see the top of those repunched 'D's inside the primary mark. However, when I look at the photos of that variety on coppercoins, there are nothing there. Why would the northeast part of those repunched D's not show inside the primary D?

I seen anacs graded 1959-D 1MM-009 list as a buy now on ebay for $25.95 So maybe the prices have jump with as new Lincoln coming out in 2009?