When Edward III died in 1376, several items of heraldic display were arranged adorning his tomb. Among them, is a crest. It is a leather formed leopard, covered in gesso and gilt. This is one of the extant items I looked at when planning how to make
Here is the website that gives a bit more history and shows a reproduction.
http://www.myarmoury.com/feature_mow_bp.html
Here is a discussion where the author of the above page shows his reproduction crest and talks with Armour Archive members about armour mirroring contemporary fashions and people's interest in wearing crests in combat now.
http://www.myarmoury.com/talk/viewtopic.php?t=5265
This page shows some photographs of the original items in the wall case of Canterbury Cathedral.
http://piersperrotgaveston.blogspot.com.au/2011/01/canterbury-cathedral.html
