Thanks Jim - nice early example of the HMV Logo ("PATENTS APPLIED FOR").
Notwithstanding the excellent advice, insight and support on this Forum from the likes of Barry, these two websites developed by the late Graham Barber are a treasure trove: -
http://www.restore-a-gram.co.uk/home/4589356292
http://www.graham-ophones.co.uk/home/4578994560