Here's what I did. I posted this a couple of years ago on a thread about birth year pipes. Obviously it's not the exact year when you get a Peterson like this but for us it did the trick. You'll have to research the stampings on Pipedia to see what to look for and patiently scan eBay or other estate sellers. If you have the bucks for a Dunhill then go for it, but it might take even longer to find. Good luck!
" My wife and I weren't all that much into getting birth year pipes as it just didn't seem that important to us. That coupled with the fact Dunhill is about the only pipe you can usually date to a single year, made it just too expensive an idea for us as well. So we opted for the "birth era" pipe. Looking for a pipe that could be dated to within a small time frame that was around your birth year. This was not something that we spent much time on, but over the period of about 6 months we both found pipes that fit the bill. Some Peterson pipes can be dated fairly closely to a certain time frame. For me it was the pre-republic period where the stampings dated a pipe between 1945-1947, and for my wife pipes whose stamping dated it between 1937-1941. We just liked the idea of smoking a pipe that was made around the time we were born, no other reasons, other than we both like old pipes that have some history."