How do these work? (20-0-20 indicator)

[krv3000]

hi don't panic right the spring 1 full turn shod be enough but check that it dus not over wind when you operate the plunger as for the hand the proper way to culler it is by polishing to a mirror finish then change its culler with heat but all I do is give it a good clean then go over it with a indelible ink marker don't pant as this will mack the hand bigger and heavy