SJJ ~
Interesting topic.
Note* I acknowledge that the coat may be a knock-off as suggested. But since there was no green/solved check mark, I can only assume it is still involved in some degree of debate.
I may be a day late and a dollar short on my arrival here, but I thought I'd add my 2-cents worth anyway. When I was scrolling down the "What Is It?" topics for a new thread to haunt, the first thing that caught my eye about this one was the 4833 views it has received. I read through the various comments the best I could, but admit I may have missed a key clue or two. But one thing I did notice, and was surprised about, is that not one picture of a real pea coat had been posted for comparison. And that's when I started my personal search to find out exactly what one looked like that was in good shape and not deterioating. The result of my search lead me to the website below that I have provided a link to. From it I found the pea coat pictured, which I just grabbed at random as an example, but it is not intended to suggest that it is exactly like yours, but rather to draw attention to the website itself which shows approximately 80 different pea coats. I haven't even looked at all of them myself yet, as I am not familiar enough with your particular coat to make an educated evaluation. But since you have the coat, I thought that you might. If you use the site, make special note of the various worded descriptions. In one of them their may be a clue that will help.
For example, in the description of the 1960s pea coat below, and various others from that era, it mentions ....
"Corduroy Lined Pockets"
When they started lining the pockets with corduroy, and for how long, I do not know. But it might be a place to start and check your coat to see if it was made this way. And please let us know what you come up with ... that is, corduroy lined or not? And from there we can go to phase two if necessary. But please don't ask me what phase two is, because I haven't gotten that far myself yet. Lol
Thanks,
SBB
Pea Coat Link : (Includes two pages of pictures. Click on pictures for additional details).
http://www.vintagetrends.com/milita...tage&CA=Men&SC=Jackets/Coats&ST=Navy+Pea+Coat
On the site there are samplings of officers coats as well.
Basic description of coat pictured below:
[ 1960s vintage pea coat with original tag and corduroy lined pockets ]
(With "corduroy lined pockets" being the emphasis of my over-worded post).