RH
they made some good gear over the years, the side toasters are brilliant, i had a 1930s one that only did one side at a time, when you dropped the sides the bread slid down and turned itself so that when you closed them it was on the other side.
Just turn the screws out, if you look carefully you might be able to see the marks left by the glue, the sensitivity screw might be a luttle more time consuing to set as you need a dry load (or a well spun wet load) each time to check out their operation, if it is stuffed i have loads of dual level pressure switches, so you can have one of them to play with ;-)
Ps if the screws are very stiff, i heated up a flat bladed screw driver and pushed it into the screw, hey presto it turned without the screw driver blade slipping, a bt of wiggle and it came out same with the other screw.