Topics of the December 2006 meeting in Sydney were "4 glass regulator 400-day clocks" and "literature available for 400-day clocks" generally. 

Of course there was a discussion on the definition of "regulator" as applied to clocks in general, which covered everything from a jeweller's regulator to those Ansonia drop octagons with regulator on the front glass.  Typically 400-day regulators have French cases, movement supported from the top with a decorative sash and beveled glass.  Many case styles exist.

Apart from Terwillinger and Peter Wotton's book on Anniversary clocks the best sources of literature are the supplements from Chapter 168, the Torsion Times, Auction catalogues and manufacturer or retailer's material.  A set of the Torsion Times, complete with Index is a valuable resource.              

 Click on the thumbnails for more detail.
 

The array of clocks inspected and discussed	A Schatz and Wintermantel Patent dial C 1883/84 was the first to be put in a 4 glass case.  Seen with an ornate JUF	Round movement of the patent dial clock	Round movement of the fancy cased Jahresuhrenfabrik.  Movement has French characteristics and may have been sourced there
Two JUF's, Columns and Onyx	A JUF with a medusa pendulum unrestored and a front wind Anniversary	The front wind is probably a Bowler and Burdick Clock with a Kienzle movement	The only Electric Tiffany Never Wind in a 4 glass case and small JUF.  The Tiffany has a less well built case than the French.
Rear of the miniature JUF exhibiting a Grivolas type pendulum and very French quality movement	Post WWII with a flimsy German case alongside a "Libra" project clock	A P Hauke with a temperature compensating pendulum alongside a Gustav Becker - note the GB is supported by pillars and not from the top	The Hettich is a battery operated clock with seconds beating ball pendulum and centre seconds sweep hand.  Attractive but flimsy case
An impressive line up but only a fraction of 4-glass clocks made	Available Literature  is limited	A Welby for restoration	Note the "winged" movement

Click on the pictures for a larger view.