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This one works for me when I really need to show it.

Thanks everyone for the warm welcome. I had a go at servicing my first mechanical watch over the weekend. It's a Citizen 21 jewel Cal 0201 from an old Homer watch that I picked up on eBay for a few £. I figured I wouldn't try with something too precious for the first go. The movement was running but would stop regularly. It appears to have been a fairly successful attempt. I disassembled all the parts (including removing the extra cap jewels for the 21J movement), pegged the jewel holes and washed everything (in one of those gem washing jars with the sieve). I managed to get every gear and jewel and screw back into the right place. I carefully wound the mainspring back in by hand (with gloves on and can now see why it's better to use a winder). I oiled the components based on the normal ETA recommendations as I couldn't find a chart for this specific movement. The good news it that it still ticks, no longer stops and keeps good time over a day. There was a little bit of rust on where some water had got in past the crown. I cleaned it up as best as I could with some tea and a fibreglass brush. The winding pinion and clutch really need replacing. It seems run fast when fully wound but slows down again as the mainspring unwinds and over the 24 hour period is only a few seconds out. Is this normal behaviour? I used a timing app for my phone and it looks pretty good. Just slightly out of beat. Something I may have a go at rectifying. The last thing I did was replace the acrylic crystal as the original was cracked. It's now all back together and just needs a new strap. I tried out the microscope at during re-assembly and it seems to be pretty useful in this application. The auto-focus can hunt when viewing highly reflective or transparent surfaces but I've managed to work out how to engage manual focus for this situation. I think I'll build a proper control box to send these command and perhaps use some pedals instead of my laptop. So now just to purchase a mainspring winder and a timing machine. Oh and a decent cleaning machine. This is not a cheap hobby is it. Marks videos (particularly the ones covering the service of the AS 1900 movement) proved to be inspiring, helpful and a good guide as to what to expect more or less when tearing down a movement. Next time (although that could be a few months away. I'm about to undertake an international move) I'll make sure I get some pictures and video of the process. - Cheers, Tex

Sorry guys. I use my samsung note for forums. When I was tearing down the PW, I used my regular camera and put the teardown pictures on the computer. Here's a couple I have on my note also.