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Nigel
Please email me your email address, I have a picture or two of AE516 which according to Aceca Register was / still is ? Pacific Green.
I will email pictures in return, Hopefully may be helpful, please bare in mind printing and reformatting pictures can change the colour slightly.
Last but not least Aubrey Finsburgh has owned BE174 for 30 years or more, granted it is now white , but a good possibility that he may know or have access to the paint code for Pacific Green.
Cheers for Now
Keith