Marty,
I haven't got a clue. The Blue Book says there were 190,000 peacemakers made and the 4.4" barrel on them gets you a 20% increase in value. The New Frontiers were made at the same time as the Peacemakers, 1970-1977, so it's probable they made about the same number of them.
I would guess the 20% premium says there were probably about 20,000 made in that barrel length, but it's just an educated guess....but since you got one, I know where 4 of them are!!!
Ka6otm