This is the earyl mk 1 (2nd model told), that does not have a trigger adjuster, although apart from that the strip should be ok for slightly later models.It does have a safety catch. I got a very rusty example that I am still playing with so may add more later. Undo the grip screws and remove the grips (on mine I had to drill the screws as they had corroded in).Take off the rearsight so it doesn,t get damaged. Undo the barrel pivot screw and remove the barrel and linkage. Put this to one side unless you are going to change the short link, which can wear over time and stop the gun from cocking.If you want to remove the barrel catch, then knock out the small pin holding it and then slide the catch and the spring out. You can remove the breech seal now if you plan on changing it. On early Webley pistols you can get at the piston without removing the trigger set up (unlike the Hurricane,Tempest and Typhoon) but for what it is you might as well clean and lube the trigger. Knock out the 2 pins that hold the trigger guard on from the left of the gun to the right and remove the guard.Then knock out the sear pin and remove the sear and its spring. Remove the trigger pin and the trigger. Use a small, well fitting screwdriver to remove the lock screw at the top right of the safety catch. The catch and its spring should now come out. At the top of the cylinder end plug,below the rearsight is a small locking screw. Remove this before you undo the end plug. The plug on my gun was very tight and needed soaking to free it. I should have made up a tool to undo the plug but found a 2p piece fitted the slot and I used a small adjustable spanner to turn it Keep pressure on the plug to make sure it does not fly out as you get to the last couple of threads. You should now be able to slide the piston, mainspring and guide out of the gun. If the piston washer needs changing, unscrew the shouldered screw that retains it. On my gun the washer looked ok but crumbled as soon as I touched it. guessing it was the original washer!. Go to pt 2