Maybe the rareness depends on where you are, Pete--but I can only remember having seen one Beretta hammergun. It was from the 30's, I believe. Contrasting to Bernardellis, of which I've seen far more. And talking hammerless, I've seen way more Berettas than Bernies. But the hammergun imbalance may be because Bernardelli kept sending hammerguns Stateside pretty much right up until they went out of business. Neither my Blue Book nor my Gun Traders Guide even list any Beretta hammerguns.