Stanley Lewis's ‘The Home Front’ - Unknown Emblem

A peculiar request has arrived which I am hoping visitors to this blog may be able to answer. There is a painting by Stanley Lewis entitled "The Home Front" that he painted early in the war. Lewis was called up for service before he could finish the painting. It is currently on display at Newport Museum and Art Gallery.

The painting features all the various services active in Newport's Civil Defence - ARP Wardens, First Aid Party, ARP Nurses, AFS (Auxiliary Fire Service) and Firewatchers plus emblems of the ARP, Red Cross, AFS, St. John Ambulance and the National ARP Animals (NARPAC). The WVS is represented by the "ARP Women's Voluntary Service" badge which was replaced by the common "W.V.S. Civil Defence" badge.

There is one emblem though that is currently unidentified. It is found towards the top right and has ARP above a circle with 'N', 'M','V' and a central 'C'. I'm stumped by this. If you have the answer, please drop me a line.

Update: a lapel badge featuring the exact design can be found in the Industril ARP section of the "Doing Their Bit" book. Alas, identification has yet to be found. Given that the badge features the winged cherub at the top, and this is a feature as an emblem of the city of Newport, it is almost certainly a local business or factory, and one big enough to warrant having their own ARP badge commissioned.

Stanley Lewis's ‘The Home Front’

Unknown Civil Defence emblem