What about the sporting version? Ser # 104XXX? Anyone have a guess as to what year that may have been made and it's approximate value (not that I would ever sell it as it will ALWAYS stay in the family)? Have a really clean one, once owned by a my grandfather in 12 ga with all the factory engraving (beautiful) that my grandfather bought from his brother-in-law when the brother-in-law was in a financial mess. Guessing it's been in the family 50-60 years or so. I am sure there are plenty of 720's around, but I have never seen another one other than my own. Any thoughts would be great. Thanks!