Vintage job lot of 8 high-quality HSS counterbore drill bits in various sizes, including 2 from Alfred Herbert Ltd of Coventry.
See photographs for full description
Enscribed as follows
1) A.H. Ltd COV SUPER HSS DS912 B STD482/15
2) STD 482/8
3) HSS H523 ALF HERBERT LTD COVENTRY B STD 482/5