So... maybe, looking back on that AND extrapolating, cook at 60 C for 5 hours, and it will depend what you plan to do with the belly once cooked when that's done? It won't be crispy if that's what you are looking for, unless you reverse sear. But all depends on the cuisine you are after.
Not looking for crispiness MC I'm guessing that I can sort that out in the fry pan after the SV ... your suggestion of 5 hours seems like a good idea thank you...
I concur with this. I've just cooked pork belly as a slow cook in the oven at 160 C and it took one and a half hours to tenderise. So I think about 5 hours at 60 C would be fine. Having said his - check out this sous vide recipe which features pork belly: Cured Sous Vide Pork Belly Recipe - Great British Chefs
24 hrs at 70 C.