A Mues Special rifle sight, dating from 1935, was available in two versions: the short arm version for direct mounting and the longer arm for mounting with a bracket.
The elevation and windage are both in minutes of angle, the elevation outer scale is in yards, however, there is no correlation between either scale.
The yardage scale is for rough adjustment, while the minute scale is used for fine adjustment.
The settings for this sight are for early ammunition and long barrel rifles used after WW1 and during WW2.
Use
Rushed into production in 1935, the Mues Special was an attempt subvert the release of the fixed arm Central sight.
It had a few obvious drawbacks, mainly to do with the rifles currently in use in that timeframe. As the SMLE was only just becoming available to Australian rifle club members, who had until 1932 used either the LLE or a shortened version, the sights of the day were all calibrated for Mk.VI ammo and the longer barrels then in use.
Mues sights were used during WW1 by Australian soldiers, and this later version would have been used in a similar fashion.