A bar, cast between the headstock bearings, aimed to improve rigidity and reduce tool chatter whilst the spindle-thread size was increased in size from 3/4" to 1". The headstock bearings lost their expensive-to-produce screwed-ring adjusters (though a similar design was reintroduced in 1921) - instead the bearings were drawn into their housing by thick washers pulled by a pair of screws passing through the casting. The headstock pulley was also modified being given with a deeper, flat-bottomed groove to accept a thicker round leather belt - usefully, this accepts a modern V belt of the narrow Z-section type. In the lathe above ball-topped plugs have been inserted into the headstock oil holes and are not original - but a jolly good idea nonetheless.

The "Mk. 2" B Type was fitted with a compound slide rest as standard and had a carriage of conventional design which carried a full nut on its apron. In anticipation of difficulties in getting the apron assembly to line up perfectly with the leadscrew the 'full-nut', held in place by a large bronze nut, adjustable within a vertical slot. Although the single-grip crank handles were retained from the previous model the cross slide was now equipped with a zeroing micrometer dial. Unfortunately the gib-strip adjustment screws lacked locking nuts and, as a consequence, tended to work loose.

Rear view of the compound slide. The two tapped holes in the back of the apron were used to mount a travelling steady. The central bolt in the apron retaining plate (below the tapped holes) was used to lock the carriage to the bed when parting off, or using a milling slide, etc.
The top slide, retained by just a single bolt passing through a long tennon key, had degree graduations - but inconveniently engraved only on the rear surface where they were difficult to see.

"Nylock" nuts on the bed plate show that this to be a modern photograph but otherwise, apart perhaps from the non-original (but correctly-shaped) striker bar for the automatic disengagement of the longitudinal feed, this is entirely original lathe.