Who is/was N66 among #4 supplier codes????

[me2]

Found N66 stamped on the left side of receiver all the way to the front next to the receiver ring. This is on my Maltby which is dated 1942. I have scoured my big Skennerton book and can not find that code. Anybody know who it may be?

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[Mk VII]

Scottish Motor Traction, Edinburgh.

[me2]

Thank you. I figured the N meant Northern district but did Scottish Motor Traction actually make Receivers for the #4 rifles or perform certain machining operations on them.

[Mk VII]

They certainly didn't make them; as a bus operator they would have had a machine shop but not much more.

[krinko]

Is the "N 66" mark round?
If so, it's going to be one of the unique Maltby "inspector's marks" that would be very easy to find on a Maltby receiver after 1941.
A single letter over one or two numbers in a roundel.
-----krinko

[me2]

I'm not a good photographer but hoping you can see the general layout of these stamps. They are from top to bottom:

Broad arrow
crown
N
66
It is straight forward stamping, no roundel. Also, this rifle has an A stamped above the last 2 digits in the serial number which should indicate there is something NOT standard about the rifle according to various sources. Could this fact be a possible reason for the N66 stamp?
The metalwork is surprisingly smooth and it appears to be blued not Suncorited. All stamps are sharp and with no signs of having been restruck or polished. For a 1942 rifle this to me seems strange. Finish was the least concern during the pressure put on production during WWII. It has absolutely no import marks, not even the often seen "England" stamp. This one has been somewhat of a puzzle to me.

[Peter Laidler]

It's an examination mark and not a manufacturers mark. I believe the examiners used to travel between factories or be changed around, hence the old fashioned title 'travelling viewers'