Being new this is my first posting-I have recently found a model 6944 with a serial # higher than 0558. This pistol has a stainless steel slide and the serial begins with TVD. On the opposite side is a stamping for DSC Prescott Az- This I believe is Davidson's. How can this DA-6944 be possible with a serial # higher than the rare 518 supposed to be manufactured? Just checking because the gun is for sale.