Going EFI soon on S2 lump, and ive acquired what would seem to be some light green cossie injectors, but im not sure of the part number?

on the green plastic body the part number is 280 150 743

anybody know if these are cossie injectors? and if so if theyre the 355 or 803 capacity or whatever they are

im sure theres someone out there more knowledgable than me