Rolex London Service costs for professional models (Seadweller 116600)?

[Bigstam]

My Seadweller 116600 is with Rolex as we speak
With the exact same work being done
Total of £794
£630 for the service
£127 for the Crystal
£37 for the crown


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Is the Crystal replacement required for all SD services or is yours damaged? My 116600 could probably do with a service but the crystal is perfect still.

Cheers

Ross