Here is a specimen CD 350 E.S.A / 218 two piece helmet likely from Morocco. The two pieces are cemented together. Its next to a CD 154 for size comparison.

Several hairline fractures spanning the upper portion but no impact damage or chips, so maybe it filled with some water while on the ground and froze or the cement expanded and contracted in a wet environment. Cracks look and feel very stable. Glass is consistently clean and smooth. If it comes apart in transit, I'll refund your money. I'll post a second picture showing the fractures

Minty these are $125 ~ so how about $45 + shipping for this one. Email with questions. PayPal preferred but checks or Venmo certainly okay.

REDUCED to $35 + shipping