Ault Supreme
I'm guessing that this is a 1950s Malerne product. Pictures from eBay listing:
OVERVIEW
Pitch: Bb
Key System: Boehm System
Maker: Malerne
Brand Name: Ault Supreme
Place of Manufacture: France
Approximate Date: 1950s
Body Material: Wood
Bore Type: unknown
Key Metal: plated
Keywork Quality: unknown, but poor plating
Serial Number: unknown
Recommended For: unknown
Value: up to $200
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Note the upward curve of the rib on the top pad cup.