Accurist, London, UK

Alarm Chronograph
Miyota (Citizen) 6W50, Renata 395 or Maxell SR927SW
Front and Story Chameleon Bezel Dial Top & Bracelet Back Movt Wrist & truest Colors Wrist Side1 Wrist Side2

About the Accurist Brand
The Accurist brand is in fact an English marketing brand.  They were started, apparently, by the Loftus family in 1946 to assemble and market watches using Swiss & Japanese components.  They started up in Clerkenwell, which is at least the right place for watches in London.

Thank you Michael Wright (UK) for sending me this additional information.