16th CenturyContinuation 2Ca. 1550:First use of wheel lock carbines and pistols in the cavalry.Ca. 1550:Introduction of over under pistols with two barrels on top of each other.Ca. 1560:First appearance of Dutch snaphaunce locks on guns. They have an internal mechanism, forward rotating firingsteel and a movable flash pan cover. Ca. 1560:The so called petrinel, a firearm with a downward curving stock supported on the chest, is used mainly in thecavalry. Ca. 1560:First barrels with spiral rifling are most likely produced in Nürnberg.1564:Prove stamps introduced in Suhl, Thüringen.1566:In the ‘Fronsperger Warbook’, tromblons, weapons with trumpet shaped muzzles are mentioned for the first time.