A couple of variations for Fire Guard shoulder titles cropped up on eBay. First is a yellow Sector Captain; I've seen this in white before but yellow may be a local variation. Second is a Senior Fire Guard; I've seen this as as written in one line before but this variation again maybe a local variation. From the same seller is a red Fire Guard title that is also thought to be of wartime production.
News about interesting insignia, ARP related info and period photos that turn up.