I saw this under new posts and I thought it was intriguing. I sometimes wistfully browse at vintage instruments and always find myself attracted to birth years (‘53). But, I’m not really knowledgeable enough to buy vintage. I make unwise choices.
I have a 1944 Martin - my birth year. Now, I can't guarantee that's the exact year it was made, but it is definitely from that time period - within a year or two.