Obverse:

ST[IEFN]E. Crowned bust holding sceptre in right hand.

Reverse:

[G]ILEBER[T] ON SV. Voided cross with a mullet in each angle.

A few weak areas otherwise about very fine and seemingly unique. 

Gilbert is known to issue the later Awbridge type at Sudbury (EMC 1200.0211) but we have not been able to locate another example of this type for this moneyer and only one other example of this type for Sudbury, a broken fragment, moneyer likely Edward (Halls Hammered Coins - HHC4874). 

Ex York Coins - JCN48 - $1,695

Ex Tim Owen Coins