JVS, in what I believe is this rifles final production year, my 1999 Marlin brochure shows two centerfire MR-7 models, The walnut stocked MR-7 with the Browning A-Bolt style detachable magazine & hinged floorplate and the birch stocked MR-7B with blind magazine & no sights available. Both had non Micro-Groove 6 groove barrels. The Mr-7 is offered in .25-06 Rem., .270 Win., .280 Rem. & .30-06 Sprg. The MR-7B is offered in .270 Win. & .30-06 Sprg. only. I'm not sure, but this may have been the only production year for the .25-06 & .280 so the potential is there that not many of them were made . I'm interested in buying one in either of those two calibers & have been looking on the gun auction sites; very hard to find. So, like you, I would like to know production run numbers also. If you find that info, please let me know.