Helmet for Soviet spacesuit on eBay

We found on eBay the helmet for Soviet spacesuit “Yastreb” designed for extravehicular activity during Soyuz-4/5 missions in 1969. It was made in USSR in the 1960s by the spacesuits manufacturer NPP “Zvezda.” Link to eBay: http://rover.ebay.com/rover/1/724-53478-19255-0/1?ff3=4&pub=5575561976&toolid=10001&campid=5338641195&customid=&mpre=https%3A%2F%2Fwww.ebay.it%2Fitm%2FHELMET-FOR-SOVIET-SPACESUIT-YASTREB-FROM-ITS-TESTER-PLUS-INTERCOM-HEADSET%2F282891541048%3FssPageName%3DSTRK%253AMEBIDX%253AIT%26_trksid%3Dp2060353.m1438.l2649