Need info on some Derwents from serial numbers I have.

Does anyone here have access to records that show which upgrades were carried out on Derwent engines? Records must exist somewhere.

I have the serial numbers of some engines and I need to know if they had upgrade 585 dated 16.10.1952 carried out on them (introduced combustion chamber inter-connectors of increased area for the Mk.8 and 9 Derwents).

Thanks