Hublot Big Bang Unico Timing Help

[AresNorth]

Hey guys I recently got a Big Bang Unico second hand and it seems to be gaining 10 seconds a day. I have been trying to find what +/- it should be within and not finding much. I know its not a Rolex or Breitling movement and its not based on ETA I have no point of reference. Does anyone know if this is normal or close to it or if I should send it in for servicing. I am worried going to AD they are going to tell me to service and I don't want to pay for it if this is normal but will if its not. Thank you for any input