NavList:

Art, you need to rotate the knurled knob behind the frame anti-clockwise. This will push the squared part of the rising piece upwards away from the bracket that is held to the frame by three screws. When it will "rise" no more, you wiggle and pull to release it from the frame. If it won't budge, apply releasing compound, e.g Penetr8, and leave it in a warm place overnight. Repeat until it budges. Then rotate the rising piece through 90 degrees, push it back into the square hole and rotate the knurled knob clockwise to draw it into the bracket.

Alternatively, remove the knurled knob by removing the small screw that goes through its centre. Pull it off. Turn squared end of the shaft clockwise a couple of turns and gently tap with a soft faced hammer. This should release the rising piece together with the screw that makes it rise and fall, but at the risk of damaging the screw, so think of it as the "if all else fails use brute force" solution.

it is not to difficult to make your own mirrors at little expense. See "New mirrors for old" at www.sextantbook.com

Bill Morris

Pukenui

New Zealand