I suspect it was used by market hunter of late 19th and early 20th century. It is remarkable design with many parts that lasted for long time while it's competitors like the Burgess or Spencer did not. I seem to remember capacity being same as Model 12 five plus 1. I'm always on lookout for long barreled open choke one. The last "shot & ball" special was 16ga with long barrel and IC choke. It was in bad shape so I did not buy it. One advantage of this gun is that Norconia (Norinco) is making new clones for Cowboy shooters. I suspect parts will interchange with little fitting. This is big plus for this model.