Directors and Officers Insurance in 1970

I have come across a Lloyds D&O policy from 1970.

Observations:

Its a 3 year policy written with a public company as the named insured.

The insureds are the directors of the company an officers listed.  The policy lists 21 officer positions that are insured.  If your title did not show up on that list, you were screwed.  My guess is that this company has hundreds of officers.  None of them knew they were not covered.