NOS 440 magnum cam identification?

[70RTSEFB5]

Can anyone tell me the markings that should be on a orriginal factory 440 magnum 375HP cam. I supposedly purchased a NOS one but do not no how to authenticate it.

[hemigeno]

Are there any part numbers stamped or otherwise visible anywhere on it?

[70RTSEFB5]

The cam has behind the distributor drive gear stamped 45. Also right infront of the last bearing journal it is stamped B and directly across from this is
2 1. There is also a yellow band of paint in front of the rearmost cam lobe.

[hemigeno]

None of those numbers or markings mean anything to me, I was just hoping they had a partial or full part number.  If the "45" is a part number, it's not from a year I have info about, sorry.

Maybe John Kunkel or someone else can help out...

[John_Kunkel]

To my knowledge the factory cams had no identifying numbers, the yellow stripe sounds like an aftermarket thing. 

If you could find a known good original cam, a micrometer would verify the lobe dimensions.

[70RTSEFB5]

What was the rocker arm ratio for the 440 non adjustable rocker arms?