Its great to have so many knowledgeable people to learn from, yes? I've rewound a few mainsprings the wrong way in my day, and its something that one learns to quickly be very careful about because you have to take most of the watch apart to get to the mainspring. If you just starting out, take a picture of the mainspring orientation as soon as you open the barrel, and that way you can figure out which way it is supposed to be rewound once you get everything clean--very helpful especially with auto-winding mechanisms.
After a mainspring for a Seiko 6119c
They have them at cousins but are a bit expensive £16.50p, however, I also found one at £7.95.
So my question is what's the difference?