I don't remember that the 1883 was ever made with ejectors. Rare? Maybe. Nonexistent? More likely. This is probably not a factory prototype, but an ejector installation by an early, talented gunsmith. The difficulty of installing trips in the Colt action (or any action) probably accounts for the external button or whatever it is. Ejector installations on extractor guns were not unheard of in the early days. There are several variations of aftermarket ejectors on early Parkers, most of which worked fairly well. Judging by the restock, this gun has been in the hands of a bit of a hobbyist for a good part of its life. The lever position is really bad, but no surprise considering how much the gun has been fooled with. Too bad the price is off the scale. Colt letters are pretty proudly priced these days, but I would still spring for one if I owned this gun.