Peridier Filar Micrometer by Manent
A large filar micrometer made by Manent. It has a long sleeve that fits in the focuser base once you remove the drawtube with the focuser on it. This has two readouts for measuring.
view of the business end
Top view, showing the 3" tube. I removed the adapter from the
tailpiece that holds either the filar micrometer or the focuser and put it on
here for the picture.
Cover and eyepiece holder removed, showing the two slides. You can see the
two pieces that hold the threads, along with the pins to hold the missing two
pieces.
Making the missing pieces to hold the threads.