BN2 engine color

[Dave & M <rusd@velocitus.net>]

Hi Folks,

When I removed the block from my BN2, BN2L231xxx, built 29 March,
1956. I find that the original paint next to the bare metal was
orange.  The block, front & rear mounting plates, oil pressure
fitting, road draft tube, all originally orange & then  overpainted
the usual metallic green.

Were some of the blocks orange undercoated & final painted Healey
Green, or were some blocks originally orange, or what?

Thanks for the help,
Dave Russell
BN2