I have some of the Esslinger type kits, which are good for using a pry bars and such. OK for electronics work and working on iPhones.
Read
@Archer posts on dressing screwdrivers. We are so lucky to have a forum like this, and would have been a great thing thirty years ago.
The Esslinger tool kits are crap. They are made to look like Bergeon. The steel is a joke. Can not hold an edge. Some of my screwdrivers are sharper than my Xacto knife. These fill a niche for people who like collecting tools and like assortments. (don't we all?) Remember these supply places need to keep the lights on and the family fed.
Splurge the money for the good stuff. Good steel is like a chocolate chip cookie recipe. Or better yet a sublime dessert or meal. One may have all the ingredients in the same amount. It is how they are mixed together what matters.
Buy only the blades and handles needed. One secret trick is that Bergeon replacement blades can be purchased. The handles are basically pin vices. Such are sold to be ergonomic. Remember watchmaking/repair is industrialized. There have been a lot of motion studies done. And the goal is for watchmakers to service three to 5 watches a day in a highly supervised setting. I find there are three screwdrivers I use the most, depending on the watch caliber.
(There are also gnomes what live in Swiss attics, But these folk know what rules to bend/ or break)
The forces at the watch level have weird centers of gravity. So metal does not move the way you expect it to. Electrostatic forces are strong at this level. Finger oils, residuals from the molybdenum will even cause brass and bronze tweezers to stick to small parts like cap jewels and springs. Flinging such into the void never to be seen again.
Expect to spend between 1 and 5 K for the basics. Start small. The tweezers and screwdrivers are going to cost that much. The little cup for closing mainsprings not so much.
Benches are designed to keep the back straight. They are going to be a meter tall. Do not hunch over the kitchen table. Sit low, You are working at eye/elbow height. Feels really unnatural at firsts (and after an 18year break)
Timegraphers are crutches in a way. As noted there are apps for that. The cheap amazon ones are fine as are degaussers. The adjusting and timing comes later.
More practical is the cleaning machine. (why starting with clean working watches is a good idea.) One is going to assemble things many times over. It is not a mountain to be climbed. I mix my own solutions using Henry's old recipie. The secret ingredient oxolic acid is Murphy oil soap, which is a wood cleaner. Amonia and acetone are the other ingredient. Thinned with distilled or DI water. If you can afford an RO unit DI water is pure magic. Aqua vita, will dissolve anything.) High proof alcohol can be used as water displacement in the drying. Note there is a lot of absorbed water once the bottle is opened. A hairdryer and tight mesh basket can be used to remove any left over water. Hot as you can touch, was my mentors rule for the final rinse and dry.
Some correspondence schools just had students practicing screwing and unscrewing plate screws 100s of times. My mentor had me to a lot of filing. (as did jewelry classes) This more applies to lathe work. Pivot polishing and balance staff creation. More applicable for 18th and 19th century stuff. Still if the parts are not in tip top shape, then no amount of timing correction will help.
Practice taking the balance on and off. When I restarted, I mangled a number of springs. On @Archers recommendation I got the bronze Bergeon tweezers. Have yet to mangle a hairspring with them yet.
Always wind a spring with a tool. This is a major necessary cost right there. Springs can be walked out of the barrel. There is a chance hey are already slightly coned.
I have taken to using the soft brass Esslinger tweezers. These do not hold shape and get dinged up a good bit, but really are great for the basic manipulation. Keep a stone handy for dressing them. I actually use a scrap of tool steel for dressing tweezers. Not sure this is Kosher, but it does give them a good burnish. I hardly use the steel ones anymore. (I wreaked most my steel tweezers soldering microelectronics)
You should be able to pick a human hair off a sheet of glass and flip it over. (really takes in person instruction, as this is a bit of an unnatural feeling.) As I have noted elsewhere. Human tendons are designed to bring food into the mouth.
The green mat is easy on the eyes. These come in different shades. One old magazine columnist would call such the 144 square inches we live in. A good cross over swing light is a must. Natural light should come over your left shoulder if right handed.
Then there is the oils and oilers. This is a subject unto itself. I got the kit, although I am still not quite sure the difference between 9501 and 9504. 9010 is the critical one, Then probably 9504 which gets molybdenum everywhere although it stays in place.
Epilame and the specialized escape oils are something one can learn do down the road. In the old days I just used 9010, which may have more creep and is intended for the jewels. I have not yet splurged on Eplilame.
I cheated on the Braking grease. Using what ever the thread said was a last resort (9501 as I recall)
Lest I forget. Finger cots. People differ, some have stronger fingerprints than others. Totally random. Some people a good soapy scrub is enough. Fingerprints can also be like photo film. They come visible down the line as such affect oxidation of the surface. Fabric gloves leave fuzz. Rubber/petrosilicone gloves do not breathe and the hand sweats more. Watch factories are cleaner than most surgical rooms and smell much the same. Work clean. I got sloppy a few weeks back, and am still waiting for the part from eBay that vanished into the void.
I see while I was writing this. Do not get a Jaxa watch wrench case destroyer. These also require vices clamping fixtures and microfine cloths. The rubber ball works wonders. If I can not get the back off I take it to the local watchmaker to loosen for me. They do this every day. Oyster knifes are one of the things I do use the cheap stuff for.
So now you can sort of see how this is going to cost a grand or more. Jewel, case and crystal presses are going to cost that again. Then there are the turns. poising tools and lathes.
Note this takes time. I joined these forums in 2022 and am only now feeling comfortable here nearly two years later of practicing on AS and Landeron Chronographs, to feel comfortable working on my Omegas again.
Sorry 1000 words, no pictures.