Hi - I have a few old wristwatches, I'm transplanting the hairsprings from donor watches. They all have small brass pins/wedges pinning the outside end of the hairspring into the balance cock 'stud'.  This seems to be a fiddly job and I've managed to lose 5 of the pins so far (all sent flying to the four corners of the room, never to be seen again!). So I'm out of pins now. I presumed these would just be called hairspring or regulator 'pins', but I see on the web that regulator 'pins' can