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OK, so my first walkthrough here. More a picture reference for people, who like me, cannot remember for the life of me where things go. Not a particularly nice movement this, a pin pallet chrono, but one in need of a service none the less. Movement comes out through the front of the case. The split stem just needs a good tug to free it. A crystal lift would be needed to get the front of, but in this case it was poor fitting and just fell out. The split stem The dial screws, one is a little hidden under one of the chrono levers The dial comes off, with a little spacer ring Chrono wheels are held in place by this stamped spring plate. It simply slides backwards for removal. Note how the fingers locate on each staff. With plate removed, the wheels can be removed. With the top plate removed, the operating levers can be seen. The small V shaped spring top right is the only thing providing tension on any of the chrono levers. It pinged across the room while I was reassembling. Much swearing and searching ensued. Fortunately a found a subsitute that did the job. The date mechanism is modular, simply remove the two screws and it lifts out as one. I have to admit I only gave this a cursory clean rather than a full strip. With the balance out you can see the lovely pin pallet The click is just a small spring tucked away in here This plate screw is the location for one of the chrono levers so remember where it goes. The sub-second wheel needs to be removed from the drive wheel for the chrono The rest of the going train And finally the keyless works, which like the rest of the movement are pretty simple After cleaning, reassembly was pretty straight forward, though aligning all of the wheels under the one-piece plate was a bit tricky. (And the escapee incabloc spring, I have slotting them back in). One point to note is that, when re seating the chrono second hand, the spring plate needs to be braced agains something otherwise the pinion simply pushes out as you try to attach the hand. Once back together and oiled, time keeping was not too bacd. Not excellent, but then it is a 40 year old pin-pallet which was desinged to be disposable. I could not find a lift angle for the 8420, only the 8422, which I assume to be similar, which is a slightly unusual 60 degrees. The crappy crystal was replaced with a rather funky bevelled and armoured Seiko item, for reference Heuer Ickx's take a 33mm exactly crystal.

I use moebius 8213 on barrel walls. Not too pricey and seems to do a good job. My 20ml pot will probably outlast me unless I find another use for it.

Ok clearly I haven't mastered linking videos. here's the link

I was always advised that the dumbest thing to do with any question was to not ask it. Asking questions is the outward expression of an enquiring mind, and an enquiring mind is a sign of intelligence, not dumbness.

Best statement on the forum yet!

Actually, it's just the opposite. See here: http://people.timezone.com/library/wglossary/wglossary631691881806327073 edit to add: There is no question that is a dumb question. Ask away, we all are here to help.

.........THIS! B)