Looking for advice on 3rd-2nd century BC helmets

[Sextus Saturninus]

The helmets used in the period were varied. The attic style was generally used by higher ranking soldiers and Hellenic patterns were popular among the cavalry as well as officers. The Apulo Corinthian helmet was used by just about any soldier, not just the Triarii, who are usually depicted wearing it. The Apulo Corinthian helmet was inspired by the wearing of the Corinthian helmet propped up on the forehead, such as in many statues. The Italian warriors of the various tribes saw the wearing of the helmets up on the brows and wanted to equate themselves with the Heroes and Gods in the tales that the Greeks in southern Italy brought when they traded with the tribes. Naturally, the Romans, who were among these Italian nations, adopted the helmet and some were in use all the way up to the first century A.D. I have one sold by Kult of Athena and I am going to use it for my Socii Extraordinarii impression for the 3rd century B.C.

The Montefortino helmet was another popular style. Used by line troops extensively for hundreds of years, it took many modifications. This helmet was very common among line troops and almost any of the styles ( except the Celtic ones ) are usable for the reenactment of the mid Roman Republic.