Type used in the Thirty Years' War and again in the English Civil Wars. This example with distinct evidence of that double service. Form commonly referred to as "Dutch" with ribbed one-piece skull, rolled edge visor and cheek pieces, sliding nasal bar and four lame neck guard. Sound and complete with fragmentary line bands. The tail with the center leather secured by domed rivets which pierce the double plate overlap and immobilize the articulation of the neck protection. That modification clearly made during the working life of the helmet and the leather, rivets and gussets showing commensurate age. It is well established that large numbers of lobstertail helmets used in the English Civil Wars of 1642-51 were Thirty Years' War surplus. They were used by Parliamentarians who, unlike the King, had few sources of domestic origin. "Pot helmets" of the period were made with both articulated and non-articulated neck defenses. Both had their proponents and arguments. This helmet, likely as part of a group purchase was modified to respond to the difference in warfare between the two conflicts. Specifically, the Thirty Years' War was a war of sieges while the English Civil Wars were fought in the fields.