There was recently, a thread relating to early 28ga. guns.
http://parkerguns.org/forums/showthr...t=23804&page=9
There are many lower (V, P) grade guns whose serial numbers do not appear in the 'book', due to, according to Bill Murphy, time constraints place on the team working in the basement at Remington.
I have an early 28, which did not show up anywhere, but on close examination of several in the immediate preceding, and following guns, The research director found it was overlooked do to a red mark partially obscuring the number. looking at the records it was determined that it, and the one before it, were a pair ordered at the same time by a well known NY sporting Goods store.
All of this trivia notwithstanding, 108xxx is at least 26 guns past the last one in the list in the above thread.