Perris Model PL100 (in effect a PL90 Mk. 2). With a Myford-like extension to the cross-slide end bracket, a full-depth bed, enclosed changewheels, neatly-engineered dog-clutch on the  leadscrew and guarded belt drive this more sophisticated Perris lathe demonstrates considerable attention to detail.

The design of the backgear assembly resembles that fitted to the Pre WW2 Myford ML2 and ML4 lathes being clustered together on an eccentrically-mounted shaft behind the spindle-mounted bull wheel. The countershaft (that also carried the hinge bracket for the changewheel cover) was bolted directly to the back of the lathe bed.

A view showing the spindle-bearing adjustment screws, the unprotected bearing oil holes, the simple but robust robust-for-its-size layout of the countershaft and the neat if fragile arrangement of the changewheel cover's hinge assembly.

No tumble-reverse mechanism on the changewheel drive but ample room to build a proper compound reduction of gears to give a provide feed to the carriage drive.

For an inexpensive lathe the compound slide was particularly well designed and made. A Myford like end bracket enabled the cross slide to be moved until it was well over the front edge of the saddles (a great boon when using a vertical milling slide) the clearly engraved micrometer dials could be zeroed and the knurled edges of the handwheels (in lieu of handles) provided a secure grip that allowed tiny adjustment to be accurately made - even with oily hands.

Another expensive-to-engineer feature seldom seen on miniature lathes was the tapered spigot. mounting of the top slide onto  the cross slide.
Unfortunately the T-slotted cross slide of the PL100 was shorter than that used on the earlier PL90

Above and below: the tailstock was fitted with a proper through shaft carrying an eccentric lock but, unfortunately, a simple split in the casting to close down and lock the barrel.