Kover in "Watchmakers and Clockmakers of the World"

Today I visited our local Reference Library (thank goodness these still exist despite the web). A Second Edition (1947) of Watchmakers and Clockmakers of the World by G.H.Baillie (Fellow of the Institute of Physics) was quickly fetched from "the stack" for me. This is what I found:

In the section, LIST OF WATCH AND CLOCKMAKERS, Page 183:

KOVER, ——.   London.    ca.1720-ca.1760.
      Watch Den. coll.

and in section xiv, ABBREVIATIONS:

Den. coll.  .  .  .  Dennison collection.

In section xv, LIST OF NAMES WITH ALTERNATIVE SPELLINGS there is no entry for Kover.

I've started researching the Dennison Collection (which seems to have been exhibited by the Dennison Watch Case Company at the jewellers' exhibition, 1913.) and will post something on my findings when I have more complete information.