The Police guns were the original G.P. which stood for Ghaffire Police and were made for the Egyptian Police. They can be found in Mark I, Mark II, and Mark III with variations. They used a rather odd tapered cartridge. The Mark III, had three firing pins with the outer two needing to fall into a recess around the cartridge primer. These later cartridges were made of brittle plastic and shattered on being fired. The reason for all this was that certain bent Police Officers would hire out guns to criminals who used to adapt cartridges for use by wrapping tape around 16 bore cartridges. The Mark III's would stop this. I have an original box and they are numbered 1 to 25 so that they could be accounted for. When they finished the Police contract they had a lot of tooling and parts so produced them as 12 bores for the sporting market in various forms. I think there was also a few 16 bores made and some single barrel trap guns which were cased and now very collectable. One variant was a multi choke with a spare choke tube screwed into the end of the forend. They crop up frequently here in the U.K. and don't sell for much unless a rare model in top condition. I once had a Police model that had been converted to 12 bore and proofed for 3" cartridges. It still had all its Egyptian armoury marks on it. Well made and strong workhorse guns but certainly not elegant. Lagopus.....