Not ripe yet. Wait until they turn brown and start to split open at the tips, probably late September or October (maybe a bit earlier, depending on where you are). There are two seeds (sometimes just one) in each of those small pods; when the pods open fully (pull apart by hand, if the seeds don't fall out easily), the seeds can be shaken out for planting.

After extracting the seeds from the pods, keep them refrigerated at +1 or +2°C in sterile damp sand over the winter, and sow in spring. The seeds may germinate soon after sowing or (if you're less lucky!) take up to a year to germinate.

Resin

Wow, thanks for the help.
One more question. Any idea why one of my trees has no seeds? I mean zilch, none, nana. Strange isn't it? And it my prettiest too.
Dave

Might be that it has double flowers? Double-flowered plants are commonly sterile.

Resin