No 4 (T) tech data.

[XL39E1]

Attachment 114459

The Mount and pads drawing does provide the location dimensions of the pad centre line.
Front face of action to centre of front pad is 1.5inches, then front pad to rear pad centre line is then 3.6inches.

These identical dimensions appear on 4 different and revised mount drawings, from 1940 to 1970.

Information

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[Surpmil]

A post-war drawing apparently.

Interesting that the collimation tolerance is 5 MOA!

Anyone know what "C.P.C. Treatment 600" is?

[Alan de Enfield]

A post-war drawing apparently.

Interesting that the collimation tolerance is 5 MOA!

Anyone know what "C.P.C. Treatment 600" is?

C.P.C is a UK manufacturer of chemicals, protective coatings paints and oils (WD40 type stuff)

No idea what their '600' product may have been but their product range would fit into the notation :

"Phosphate finish 1/1 Finished with Black (spirit) stain and C.P.C. Treatment 600"

[XL39E1]

The No32 bracket drawing was the 1970 version, amended 7 times from original.

Attachment 114504

Also the wartime trials no53 mount drawing dated 1944 has the same pad placement.