Model 19-5 Question

[Cherokee Slim]

I've finally been able to get a Model 19-5 round butt at a really good price. It has only a little cylinder ring wear and nothing else, so I'm really happy with it. My question is about when it was made. My 3rd edition reference book says the 19-5 started in 1982. 19-6 didn't start until 1988. The s/n is ANB49XX. I don't see the ANB prefix listed on pg 400 of the book. Any ideas as to a mfg date? Thanks for the help.
Cherokee Slim

 

[snw19_357]

All of the AN prefix Model 19's I have seen were from 1986.

Semper Fi