Hi chaps,   Whilst sorting through a box of bits and bobs this afternoon, I came across a SR Green MK1 Full Brake presented in SR green livery.   First of all, where many painted into green?   Secondly, what numbers would they have been?   Lastly, would they have appeared on parcel train duties circa 1960? (My plan is to use her on a couple of layouts.)   Many thanks in advance.   Kind regards,   Nick