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Scheme Colour name FS number BS-number Humbrol XtraColor Vallejo Model Color Vallejo Model Air
Delivery scheme Undersides Light Grey     129 X317 70.986  
Upper side fuselage, wing, etc. Dark Grey     92   70.830  
Struts, floats etc Black ~7038   33   70.950  
 Colour scheme from 1925 and on
Standard #2 Overall Light Sea grey     129 X317 70.986  

Check www.paint4models.com for an extensive conversion table with lots of colour and paint systems.