[3] A number, when added after the letter code, indicates differences between similar tender types, such as function, wheelbase or coal bunker capacity.

[3] The official SAR diagram book contains an annotation with the Type XE1 drawing to the effect that tender no.

Early versions of the built-up coal bunker sides were in the form of a slatted open-top cage, made of rectangular steel rods.

In the second example depicted, a Type XE1 tender with a sheet-metal extended coal bunker is plinthed with CGR 6th Class no.

Since their new tanks increased their water capacity from 2,855 to 3,000 imperial gallons (13,000 to 13,600 litres), these tenders were reclassified to Type XF.

[2][3][5] The program to rebuild several older tender types with new upper structures was begun by Col F.R.

Collins DSO, who approved several of the detailed drawings for the work during his term in office as Chief Mechanical Engineer of the SAR from 1922 to 1929.