Karl, The OO grade is the lowest grade of pre-'13 guns and, in itself is very common--- over 48000 having been made. However, with the features your gun has it is very UNCOMMON !For instance, only about 10% were sold with ejectors and the Hunter One trigger wasn't even listed as an option! The ivory sights were special-ordered. You might consider ordering a Research Letter on your gun which may mention the Hunter One trigger.