The gauges are intended to enable modellers to set-up
rocking W irons and fixed and sprung axleboxes so that the axles are
parallel. This greatly enhances running and helps prevent derailments.
A pair of gauges
One is for wagons with a wheelbase of 60, 70 to 120 in 6
This is the gauge to use for 90 wheelbase wagons as it will balance across the two axles. The unmarked slot
is to straddle a brake cross shaft on a 90 wheelbase wagon if already fitted.
The other is for wagons with a wheelbase of 60, 70
to 220 in 3 increments
Although this gauge has the
slots for shorter wheelbases, it is designed for use on wheelbases greater than
120 and for any wheelbase of ending in 3 or 9.