can anyone ID these old rad valves? want to replace them

[bassmanL]

hi,
our heating system runs with 8mm or 10mm microbore pipes and the radiators are all fitted with this kind of valve:

i haven't found anything comparable anywhere on the web, and certainly not TRVs that would be compatible... maybe somebody knows what they are and how they can be replaced?
thanks a lot in advance!

 

[Terrywookfit]

Alter pipe work to suit new valves !!

 

[nickso]

as above, remove the old olives/nuts and rad tails, buy the suitable size trv's/lockshields and fit them.

 

[bassmanL]

thanks guys. looks like the rad tail nuts have been repeatedly painted over ... will be a pleasure to unscrew. i've already cursed the previous owner more than once for other botched jobs!!