Could anyone explain futher for this newbie how the grades of hammer guns were categorized? were hammer guns made concurrently with hammerless up untill the end or are hammer guns typically older. was the fishtail lever people like so much an option or available on specific models or after a certain date? is the underlifter an early option or was it simply preference of the buyer and available concurently with top lever hammers and hammerless guns?
thanks
Aaron
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