I know that they made these for about 30 years or so, but since they weren't a serial number gun, is there any way to determine whether you have an earlier or later one. I have a Model 69A with chrome bolt & trigger guard and scope rail and am curious. I searched them on gunbroker but none have dates listed. I'm guessing later, but I have no idea. I ask because there appears to be different models with different features such as sights, safetys, etc. and I wonder about parts. Thanks, Brett