[Bell Historians] Pointy heads

[David Bryant]

Bill:

> You wait until you read my magnum opus: 'British Standard Whitworth
> bolts used by Day's of Eye 1902 - 1904; head shapes, thread profiles
> and suggested manufacturers; with an appendix indicating probable
> spanner usage based on an analysis of nut markings'.

I trust you won't overlook the possibilities of adjustable spanners,
stilsons or universal sockets. Tha latter may perhaps leave marking from
their pins on the upper face of the nut / bolt.

David