VINTAGE GRAY-BONNEY BSW (WHITFORD) WRENCH SET OF 6 IN ORIGINAL ROLL

All wrenches are marked 'MADE IN CANADA BY GRAY', 'CHROME-VANADIUM' & '2'.

Whitworth and BSW spanner markings refer to the bolt diameter rather than the distance across the flats of the hexagon (A/F) as in other standards.

Each is etched 'A B POOLE' by the previous owner along with his imperial conversions of the sizing:

• W784 → 1/2 & 7/16 BSW 
• W783 → 7/16 & 3/8 BSW
• W776 → 3/8 & 5/16 BSW
• W782 → 5/16 & 1/4 BSW
• W774 → 1/4 & 3/16 BSW
• W781 → 3/16 BSW & 2BA