Free rocket seeds?

Last weekend I had a tidy up in the garden and found that I had a load of seeds on last years rocket that had bolted (flowered).

I cut off all the stems and brought them inside to have a look. I was able to get maybe 40 seeds that looked like they were in good condition from the seed pods. I have compared the look of these seeds to that of the few I have left over from the last sow and they look exactly the same.

I read somewhere that rocket seeds need to be two months old before they will germinate. I wonder does this mean from the time of picking, or from the time they have finished developing in the seed pod, or when? I have put the seeds in a piece of kitchen paper and left them in the kitchen to dry out for the time being.