I just bought a rifle with an FN mauser 98 action and it came with and old Lyman peep sight. I could not find anything about it online. On the sight itself all it says is Lyman and has the number 69 which appears to be the model number. On the mount that it slides into it says Lyman FN and also has the number 69 on it. I found nothing online about a lyman model 69 peep sight. Do you have any info on it or on its approximate age or value?