Puzzling Evidence - Mysterious Belts and B. Blumenthal & Co. Inc. 1930s Jewelry

In previous posts about Deco-era cloisonne beads, large disk-shaped beads with slotted openings appear, often in a distinctive brass belt:

• Chinese Cloisonne Beads from the Art Deco Era
• Cloisonne vs Champleve in Chinese Beads
• A Helen Burton Champleve Connection?
• The Fenghuang, or Chinese Phoenix in Cloisonne Beads
• Chinese Cloisonne Dragon Beads from the 1930s-1990s

These belts often feature cloisonne dragon and floral beads that appear in designs by Louis C. Mark for the Rice-Weiner company and pieces attributed to Miriam Haskell.
However, the large disk-shaped beads also appear on brooches or pins with the B. Blumenthal & Co. Inc. trademark stamp:

On offer from eBay vendor moonspinner09

Rubylane shop owner Karen A. at Rare Treasures connects the dots and suggests that these brass belts might actually have been produced by B. Blumenthal & Co. Inc.

This seems like a good possibility, as the brooches and belts are consistent with 1930s fashions and costume jewelry.

UPDATE: A blog reader has contributed these photos of matched octagonal champleve phoenix and dragon disk beads that  the seller stated were belt pieces. "I found them at a very tiny and primitive antique shop on Hwy 90 Bat St. Louis ,Mississippi pre 1990's." 

They seem carefully enameled, with the unusual feature of turquoise enamel surrounding the slotted hole and what seems to be a silver plating.  I like how the artisans colored each piece a bit differently, especially the phoenixes.