I dont think that's a DT125LC mk1 carb, the id says it's a 3BN00 carb .... That's a DT125R carb, early DTLC didnt have those heater piping spigots
The correct id for a DT125LC mk1 is 10V00
They are for a DT125R whatever year it was made, dunno about using them though, I assume you'd have to remove the old ones somehow...dunno about that I've never done it
Best to ask the seller I'd say