Wow,

That is awesome results for such old seeds. Did you keep them under any certain conditions? Froze?

I have had seeds that were around the 2-3 year mark germinate for me at around a 50% ratio.

Congrats on the plants.

I hope you get a top quality pheno of a female and male so that you may breed them. In order to get back your seed stash, and keep your newly re-found strain.

Peace