Earlier members of the class ran with the de-streamlined tender (TB6) or the non-streamlined tender (TB7). These three tenders were built contemporaneously with the 9 ton type provided for the Class 5 (TB3) and showed the same modifications. The main difference was the provision of a welded water tank so that there was no visible joint between the tank top and the tender sides and rear. However, the position of the internal baffles and ribs in the coal space was evidenced by lines of rivets which marked them out from the fully welded and hence smooth sided earlier style. Though new construction and never streamlined, for some reason the side profile of these three had a high cut out at the front, so giving them a superficial similarity to the de-streamlined pattern. The rear, however, had conventional steps with a side handrail, ascending steps on the frames and a single water filler. Like all except the five provided originally for the ‘Duchesses’ 6230-4 there were no tubular air vents. These were fabricated and concealed within the structure.
The tender underframe had standard axleboxes but with the Ivatt modified spring shackles and bracket. Water sieve boxes were fitted from inception.