I really ought to be able to say something interesting about this model...... Here, read the Telechron Tidbit while I think................................
Those little doodads that hold the rotor in place are called spreader
posts. They came in a variety of styles over the years.
Have a look--
From left to right: not a case grommet (but made in the same machine), an early post from when H rotors had wings, a wooden one (yes, these are for real and I think they used from ca. late1939 to ca. later 1939), a B rotor post (from later B rotor clocks like the Olympic or Harwich), a common brass post from the 40's, a very common late 40's to early 50's aluminum post, a mid 1950's plastic version and finally an S rotor spreader post from about 1959 on...