Here are some images from 1430-1439 showing a few different things people wore on their helms.
http://manuscriptminiatures.com/4888/14202/ 1425-1435 Austria
A torse (rolled fabric band encircling the head) and a fine feather coming from the centre front.
http://manuscriptminiatures.com/4888/14197/ 1425-1435 Austria
A torse on a kettle helm and a fine feather coming from the centre front.
http://manuscriptminiatures.com/4888/14198/ 1425-1435 Austria
Same manuscript, same soldier, same red torse.
http://manuscriptminiatures.com/4616/12838/ 1435 Austria
Small diameter torse with cylindrical plume
http://manuscriptminiatures.com/4616/12842/ 1435 Austria
2 feathers from ring on top of the grand bascinet.
http://manuscriptminiatures.com/4616/12826/ 1435 Austria
http://manuscriptminiatures.com/4616/12837/ 1435 Austria
torse worn over grand bascinet, both over hinge roundels and under hinge roundels
http://manuscriptminiatures.com/4616/12835/ 1435 Austria
loose torses, one with hanging tail
http://manuscriptminiatures.com/4655/10134/ 1425-1430 France
Close fitting mantling with a single tail. The lance implies it is to be worn for jousting.
http://manuscriptminiatures.com/4905/14549/ 1430 Germany
This one its interesting. There is a cone circled by stiff feathers rising out of a crown, all worn over a hem. There is also a red wing that could be coming from someone else, or could be some errant dagging flicking up.
http://manuscriptminiatures.com/4905/14563/ 1430 Germany
4 ostrich style feathers in 2 or 3 colours rising from the top of the slotted kettle helm. No mounting point visible.
http://manuscriptminiatures.com/4905/14547/ 1430 Germany
Everyone wears a crown.
http://manuscriptminiatures.com/4905/14550/ 1430 Germany
A red wing rising from within a crown. There is a torse with no visible tail around the crown, all worn on a slotted kettle helm.
