As a guide, I am usually able to reproduce virtually any non-fluted lobster tail helmet to this standard for around this price, and in any head size.
This particular helmet has a 2-piece skull, pierced cheek pieces, 5-piece articulated neck-tail, and a lockable sliding nasal bar. This lobster tail helmet is of the same pattern as the winged Szyszak. (24” internal circumference as standard)

Made to order £425