Model 1889 Colt D/A Revolver .41 Caliber:

 September 25, 2020 New Zealand born Metropolitan Police Sergeant Matiu Ratana was shot and killed by scumbag Louis de Soysa in a Croydon London police custody cell. - He had been arrested, handcuffed, and searched by the arresting officers - but the antique Colt revolver he was carrying holstered under his left arm was not detected.

https://www.mirror.co.uk/news/uk-news/breaking-man-guilty-shooting-met-30294024

The handcuffed murderer was on camera as four shots were fired from the revolver, - the bullet that entered his neck caused a brain damaging blood clot he survived - now needing a wheelchair to serve his WHOLE LIFE SENTENCE.

The sad killing of a long service police officer was very unusual in many ways. - the killer had been searched and was handcuffed behind his back .. but managed to get the gun from it's holster and contort his 25 year old body enough to fire and kill an officer due soon to retire - using home-made cartridges.

I identified the ".41 Revolver" from this police image as a Colt Civilian Model 1889 D/A revolver -  said to be in .41" Long Colt caliber - the first gun made to have a 'Swing-Out' cylinder. The barrel looks to be the 4.5 inch model.

The early versions of this round used an externally lubed Heeled Cartridge - but this was later changed to a hollow based internal-lubed lead bullet of reduced diameter that was expected to bump-up to bore size under gas pressure.

The 41 Long Colt cartridge is regarded as an obsolete Black Powder relic no longer made - while this revolver was sold at auction in UK as an antique.

Marty K.