QUOTE (Vintagepens @ Aug 14 2008, 09:33 PM)

I'll bite.
"Filigree" came in two versions. The trefoil pattern, and the more abstract later pattern, often termed "Basketweave" by collectors. Both are properly called "Filigree", however.
"Night and Day" should properly be called "Moderne". Note the very rare variant with alternating barleycorn panels.
Don't forget smooth (not that common!) and Hand Engraved Vine.
There are also various patterns not sold or rarely sold in the USA (e.g., Barleycorn and Commercial -- aka Line and Dot), though it must be noted that French- and English-market overlays typically did not bear a 452 stamp, only 52.
What you can add, as multiplying factors, would be regular vs LEC versions, early production with wide clips vs later production with narrow clips vs clipless versions (mostly for export, but not exclusively).
Interesting. Thanks! So, one may be able to reasonably achieve a small mini-collection.
Brian