Seago Sea Master Mode D'emploi page 12

7th Service (15 years annual approval only)
Service date
Service station number
Service engineer number
Service station stamp
8th Service (16 years annual approval only)
Service date
Service station number
Service engineer number
Service station stamp
9th Service (17 years annual approval only/end of service life)
Service date
Service station number
Service engineer number
Service station stamp