Based on the Arnstein Bible, which is dated to 1172. Exemplar here. http://www.bl.uk/catalogues/illuminatedmanuscripts/ILLUMINBig.ASP?size=big&IllID=20219
Modified to add the recipients arms. I attempted a hand based on the script used on the exemplar.
Red line work done.
“Harley MS 2798.” Digitised Manuscripts. Web. 05 Aug. 2016. <http://www.bl.uk/manuscripts/FullDisplay.aspx?ref=Harley_MS_2798>