May I ask you about period of certificate. As S1 OPM and Law requirements . If SWL of crane > 3 T, must be re-certified every 3 months , ( for Crane type for use in construction task ).
Please kindly check validation date in certificate krap.
And how about MMSVS-Rough terrain No.50/11. Why you send certificate for new unit to me but it is not registered yet. More details, you can see in attachement as red highlight krap.