Tools No. 32 Sighting Telescope No.1 Mk.1 & No.2 Mk. 1

[Alan de Enfield]

Once you learn how to set the the proper tension jam collar, you can skid the adjustment lead screw and it is a no brainer to set the scope up.
Then, just snug up the jam nut and hope the lead screw does not move.
It may take a time or two to get it down pat.
Works on all the model scopes and you can also get the Mk.III closer to the centre of the scales ....

It sounds so easy (when you say it quickly and have done dozens of them)