Kosaka introduced 'universal' pick-ups with interchangeable styli  many years ago.  This enabled the cost of instruments to be kept down because only one pick-up was supplied,  not individual pick-ups to measure  features like small bores, recess, curves, small land etc.

The Surfcorder SE-1200, SE-1700 and SE-500 models all operate with a single PU-A pick-up accepting  many different types of styli and nosepieces.