Manufactured by Irwin. Complete set of bits marked 'The "IRWIN" Bit Reg. Pat. Off' in a really sweet 3 piece fitted box from a company in Peterborough, Ontario, Canada. Superb uncleaned as found condition. I found these in Lindsay Ontario close to Peterborough.
Intact label in the box reads as follows:
THE RAPID TOOL COMPANY LIMITED
MANUFACTURERS OF
The "Rapid" Auger Bits, Etc.
PETERBOROUGH, ONT.
1 SET 32 1/2 QUARTERS Patented Oct. 28, 1906