Yea, after really looking at the jaw, it looks to me like 5/1/2, because of the ridge on the 4th tooth.  Again would like to feel the tooth.  At any rate old deer.  I now have a set fawn thru 6 1/2, like you I too am glad to have a nice set of jaw bones.  It took me 3 years to complete my set thru 6 1/2.  I prob will never get any older than that.