Originally Posted by RobF
It's the first number
4.51 S5 00
6 is the batch.
On JSB's it's the first or first two numbers. If there's an even amount of numbers it's the first 2, if it's uneven, it's the first one.
From memory i've got up to batch 54 or 56. But i've also got some single figure ones from this year.
The S5 in the number is for the number of times the die has been used I believe. I've never seen one higher than 5.