Dynasoar pressure suit (1962)
that one of them
the book "DYNA-SOAR Hypersonic Strategic weapon System"
(apogee books) has a DVD with movies from X-20 program
one movie show Space suit test in mock up cockpit with diverent suit models
with Gus Grissom and Niel Armstrong !
to Picture the suits i think but not 100% sure
first: B.F. Goodrich Mark III ?
second Gus Grissom in a NX-3 mercury space suit
three: B.F. Goodrich Mark IV ?
four: B.F. Goodrich Mark II ?
five: Niel Armstrong in a B.F. Goodrich GX-1G ?
six : A2H from ILC ?
source: apogee books and USAF