Pork leg
Grislår
68°CLean. 68 °C and a long rest — 75 °C is dry.
Cook to this all the way through
Safe minimum 70°CLivsmedelsverket
On the grill
A 1.2–1.5 kg leg takes 1–2.5 hours indirect. Your log is unambiguous: 12 briquettes is enough in warm weather, 20 if you want fire left for a final sear — at 15 you were down to 120 °C before it was done.
Very lean, so pull at 68 °C and give it a full 15 minutes rest. It carries over several degrees after it leaves the grill.