The Illustration is taken fro the effigy and shows Sir John in an unusual harness. The sallet displays large decorative rivets and shows the sculptors difficulty in representing an open visor.
Sir Johns effigy is carved from soft sandstone
The gauntlets are semi mitten with a large plate covering the hand. the fingers have individual plates unlike the full mitten design.
The pauldrons which protect the shoulders are stylised and probably a fanciful design rather than an accurate representation. Note the belt around the waist.
Learn about my illustrated book on armour http://paulfranciswalker.blogspot.co.uk/p/armour.html