

These guns mostly are called BRASS framed but supposedly, they are Bronze or Gunmetal framed but the flared muzzle extension may be brass. The problem here, without being too pedantic, is that there were at least FIVE different UK makers contracted to build this ordnance (Chubb, Greener, Cogswell & Harrison, Wolseley, and Webley & Scott) and some of them could well have used alloys they had laying around in their scrap heaps.
- There is even a Canadian version having a Zinc Frame ...jpeg)
The flare cartridges used in this pistol are the same bore size as 4 Gauge cartridges - as in black powder ELEPHANT GUNS. - Called 'One Inch' bore - they are closer to 1.1 inch.
- Can you imagine the recoil from firing a solid slug in one of these? - Large bore Black Powder Elephant Guns were dropped very quickly when effective Nitro Express cartridges were introduced ..
Some folk call this type of device a VEREY Pistol .. so named after Edward Wilson Very (1847–1910), an American naval officer who developed and popularized a single-shot breech-loading pistol that fired signal flares invented by Martha J Coston in 1859:.jpeg)
https://www.engineergirl.org/125236/Martha-Coston
http://www.civilwarsignals.org/pages/signal/signalpages/flare/coston3.html
http://www.civilwarsignals.org/pages/signal/signalpages/flare/coston.html

Oh yeah, - PS. - Do you know where you are - Like, where our planet Earth is?
Try this:
https://spaceplace.nasa.gov/galaxy/en/
FIT AND PROPER?
FIREARMS LICENCES FOR NZ POLICE.
Marty K.