generated image?the mainspring image of a mechanical wristwatch

1940s accessory accurate antique apparatus arm auto belt brand broken circle classic clock clocks close-up component currency destroy detail dial equipment finger fix fixing font gadget gauge gear gearbox gears gearwheel generated gold hand handle hours improve jewellery leather machine macro mainspring manufacturing mechanic mechanical mechanism metal minutes modification money movement occupation old operation ostrich parts pocket precision repair replacement restore retro silver small spring strap technique technology time vintage watch wheel white wristwatch yellow