I found this forum when I was researching my Model 67. I had learned a great deal about it before finding this wonderful place. My problem is I did not take notes as to where I found the info. As of Thanksgiving it will be transferred to a young female cousin of mine.
It is a 4" Model 67 no dash and the SN is 13K9152. It is an OHB over-stamped CHP police trade-in which I purchased in 1991. It has a black rear sight. I thought it dated to 1974, but I have read that the 67 was introduced in 1974 with a stainless rear sight.
I'd appreciate a ship date, if you can provide one. I can fill in it's history since I've owned it, but I'd like to tell the young lady a bit more about it.