The Mk. 1A Cub was distinguished by a "square" headstock and a number of simple "bent" controls levers. On this model the power feed were both selected and engaged through the action of a single lever on the face of the apron.
If you have one of these lathes and can supply photographs the writer would be pleased to hear from you.

The rounded headstock and dial-type controls of the Mk. 2 Cub

The Mk. 2 Cub had a separate headstock (the Mk. 1's bed and headstock were cast as-one) and was a generally more rounded machine with the lever controls replaced by neatly designed if rather large and smooth-faced  full-circle "hexagonal" dials.

The carriage of the Cub was heavily built with a double-wall apron, exceptionally large micrometer zeroing dials for the period, taper gib strips on both top and cross slides and a completely protected cross-feed screw. Unfortunately the cross slide was of the short type (with a cast cover at the back to cover the end of the feed-screw) and, whilst the power sliding and surfacing feeds were conveniently selected by flicking a centrally-mounted lever left and right their engagement and release was through a screw-in-and-out knob - with no method of reliably and instantly disconnecting the feed. Note the distinctive form of the fixed steady