No, no, no. I mean how do I determine when my '61' was made? I don't see any numbers or dots on the barrel like I have with my '51'. Are there any distinctive markings from year to year? Is there any way I can tell by the design of the box or the tag? I just like to know.

It is not recommended... if you have any 51s they will become extremely jealous and maybe even violent....

Thanks for the warning. I was about to put them side-by-side in the same carrying case!