I think there's a way to check, but no. What's cool though, is that two of them are sequentially numbered, and there is a third that is just one number off the run of three (or, to say it another way, basically i have a straight run of 4 bars with on missing).
The darker one has the lowest serial number though. And from what i've seen of JM's these are newish bars since they have the small rectangular Box on the front instead of the square...
You sound pretty happy with your purchase, hopefully your next purchase will cost quite a lot more my friend. The metal prices are really starting to show some good strength an could take off at any time, and the US$ is looking very weak. Have a great weekend, cheers.
Yep! These days i feel like i've slipped in under the wire every time :)