Manufactured in 1967 in Boston, Mass with matching numbers.
Serial number 6778 is stamped on the bonnet, breastplate, and brales.
The helmet was in excellent condition with its original tinning.
It sold in May 2011 on eBay for US$5,332 with keen bidding from 5 people. The seller’s eBay ID was “mark5” who has 100% positive feedback after over 1,000 trades, based in Sebastian, Florida.