WW2 ARP AIR Raid Wardens Post Green Enamel Sign

This lovely sign recently cropped up on an auction site, It's a dark green enamel.

UPDATE: I've been informed that this sign has been turned into a very well-crafted reproduction. It is copied from this original but the rear clearly shows it to be of modern fabrication. Identical ones appear on eBay showing the exact same loss of enamel with the following description: "PLAQUE SIZE: 28.5cm x 10cm (approx 11 inches x 4 inches). These plaques are images printed onto aluminium metal sheets using sublimation inks to provide a high glossy image. The plaques are light enough to be wall mounted using the enclosed sticky pads. Each plaque is £6.99 with free postage."

WW2 ARP AIR Raid Wardens Post Green Enamel Sign